Nice Video That You Share , So Very Nice Thanks You This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics.
I Really Like The Video From Your This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics
Your Video Is Very Useful Sharing This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics
Quantum theory was invented by insecure mathematicians as a tool for exerting their will over those who aren't big enough losers to spend thousands of hours learning insufferably boring and convoluted theories that are obviously false constructions intentionally meant to get revenge on people who spend their time having sex and rolling in meadows and fields, activities that they themselves are in capable of. Have you ever, like, SEEN a quantum entanglement, lol?
how big/small would an object have to be to follow the rules of quantum mechanics? and what happens at that point where the laws of quantum mechanics stop working and start obeying classical mechanics?
like he mentioned, quantum fluctuations can take place in objects as large as bowling balls, but to measure such fluctuations is impossible (not to mention unnecessary) given how miniscule they would be. There is no precise measurement, but quantum mechanics generally is employed at a microscopic level with electrons and other small particles.
It's well known that quantum mechanics and other fields such as general relativity do not mix, and that is a different subject entirely.
@EIvagabundo Lol, so your teacher was a dumbass and you're just repeating his words. Way to go! Quantum optics, wow, that sounds so cool, you must be so smart :)
What is physics? Physics comes from the ancient Greek word "physika". "Physika" means the science of natural things. And it is there, in ancient Greece, that our story begins.
- It's a warm summer evening, circa 600 BC. You've finished your shopping at the local market, or agora... ...and you look up at the night sky. There you notice some of the stars seem to move, so you name them "planetes," or "wanderer. "
As a scientist myself (with a chemistry and physics background), I assure you that the life of physics does not begin in Greece. I have historical, reputable, documents that the life of mathematics was in the Congo (Africa) and the life of physics is Middle Eastern at best (what we would term "Islamic", today). The Africans, Egyptians, and the West Asians are the cultures who taught the Greeks.
@mikedav9O youcanseeyourface is quoting a scene from "the big bang theory" in which a sheldon (a theoretical physicist) is teach a penny ( a waitress) , as much about as much as he can
i dont agree with his assertions, according to the complex linear vector theroem:
A+B = dxBi - dxB
This is a rare thereom that is not widely used; if it is applied to the vector theory using only direct correlations excluding any randomn variables, you'll find that i*1, is not actually an imaginary numbers because such numbers do exisist in the domain dxB.
i got lost at like, half an hour in.. if a light ray (recorder) pushes a photon in the opposite direction, why not use another light ray on the other side of equal force to balance it out?
@cportmigo Aliens prefer the intelligent design explanation for Earth. Mainly because they designed it. In fact, our universe is a tenth grade science project by two, rather sloppy, aliens called Fizzbob and Hoother. Science isn't their best subject to be honest, they prefer Nine Dimensional Music.
Ok, so one front to work on would be: How to measure, simultaneously, the position and velocity of a particle in a vacuum without bombarding it with other particles/waves (i.e. photons, gasses).
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Could quantum mechanics represent the passage or Arrow of Time?
This theory is based on just two postulates,
1.The first is that the quantum wave particle function explained by Schrödinger’s wave equation represents the forward passage of time or Arrow of Time itself photon by photon, quanta by quanta or moment by moment.
2. The second is that Heisenberg’s Uncertainty Principle that is formed by the wave function is the same uncertainty we have with any future event.
maybe if you were an actual physicist as opposed to some dude currently majoring in physics, you'd know that hilbert, poincare, gauss, et al were invaluable contributors to the mathematical framework of modern physics, and honestly, how does one call newton a physicist preferentially and not a mathematician, astronomer, alchemist, or bible scholar? oh yeah, because you're biased.
@deadeyesfallfromgrac I wouldn't say that at all, Math does not really encompass the experimental aspects of Physics and Physicists who think they can ignore expriment are really not Physicists but something else... maybe mathematicians or maybe just trolls... who knows...
I don't think math and physics are the same. For example, I can find the average value of a height of a person
and then replace every value in the sum of the heights with that value to find the total height. However, physically, I can't actually replace real people with a theoretical average person. So, to me there is a clear separation between the physical world and the mathematical world.
@MathLessonsForFree There are physical limitations that apply to natural objects but not theoretical mathematical quantities, which is why your problem arises. Another example would be how the procedure for a fractal such as the mandelbrot can be mathematically represented to an infinite dergee, yet it could only be physically represented (beit by a computer screen, etc.) to a finite degree due to a limitation in the amount of pixels / the resolution of your screen, etc.
@MathLessonsForFree Also, a good example is how theoretically in math you can keep dividing a number forever with the equation f(x) = 1/x, y growing smaller and smaller asymptotically to 0, yet NEVER approaching it; however, in real life you cannot divide an item an infinite amount of times, as you would eventually end up with indivisible quarks or whatever the most basic building block of matter may be.
@EIvagabundo Math majors aren't looked down upon by all physicists. Only those who are too concerned with politics to care about the actual physics. Also, the vast majority of our computer systems are a product of pure mathematics, as well as major advancements in engineering. If you feel like being a douche, you should remember, you are a physics MAJOR. Not a physicist. so please, oh please, wait until you know what you're talking about before you say it. Or, better yet, don't say anything.
Urgh, his use of the word set theory is bad. Classical mechanics doesn't really have anything to do specifically with set theory- if you looked at it that way, quantum mechanics is too, you could just view your vectors as elements of a set.
I could teach this better. He made something incredibly interesting into something basically boring. The 70 years olds are sleeping and the 80 year olds are dead. He needs better illustrations, examples and delivery. Then again, he teaches at Stanford and I don't.
AFTER LISTENING THE SECOND AND THIRD LECTURES, I REALIZE THAT SUSSKIND IS A PRETTY GOOD LECTURER AND KNOWN WHAT HE IS TEACHING VERY WELL. HE ALSO HAS A GIFT FOR TEACHING AND A GREAT SENSE OF HUMOR. I DEFINITELY CAME AROUND IN MY RASH OPINION OVER THIS EXCELLENT PHYSICIST AND PROFESSOR. I AM GLAD I LIKE HIM FOR HE HAS A LOT TO TEACH.
I can’t wait until I finish learning Linear Algebra and Differential Equations from the Khan Academy; I will finally be able to learn this stuff and perhaps, even contribute to the field.
Seems like some smart folks up in this bitch. Here's a question for anybody who reads this: What would happen if a Neutron Star were to pass into a black hole's event horizon? What would the singularity become? Would it be its own unique element? Would the black hole explode and create a new series of physics specific to the borders OF that event horizon?
Or, would a megaton neutron star's rapidly oscillating x-ray photons tell the black hole to get fucked and start to erode it? I dunno, doesn't seem like a neutron star and black hole are ever going to collide in a controled environment, so, just curious what others' informed opinions dictate.
@DiosGX: The Black Hole’s event horizon would simply become bigger because by “swallowing” the Neutron Star, consequently the Black Hole would become more massive – more massive means more gravitational influence, and more gravitational influence means a bigger gravitational field and overall event horizon. Also, I may be wrong, but I think that the singularity wouldn’t grow in size; it would simply become denser.
@MarvelsofaLifetime While I absolutely agree with your concept that its singularity would grow denser, as not much else makes sense, I have a question (maybe a challenge?) regarding its gravitational field. While I know all things possess a center of gravity and a gravitational field (does the word "Flux" apply here? I don't know to be honest), I think I may simply have misread what you mean.
You don't mean to say black holes pull things toward them do you? Like, PRIOR to the event horizon?
@DiosGX black holes do pull things toward them prior to the event horizon. The event horizon is simply the point which gravity becomes too strong for light to escape, and therefor to strong for anything to escape (the sole exception being quantum tunneling effects do to the statistical wave nature of photons) A black hole has a gravitation field that extends far into space just as any object with mass does.
@ngilliam12345 if by "pull things toward them" you mean warp space time so that at the event horizon all timelike trajectories move toward the singularity, then you would be correct. Its just an oddity of general relativity that the "force"exerted by gravity is actually a warping of spacetime, not a force like we see in electromagnetism. Otherwise, you would feel the earth pulling on you right now and you really don't, in fact you feel it pushing you away from your inertial path.
@chrisahc Well you don't know physics then. What you saw here is the ABC or the 123 of advanced physics. You major in math right? Have you noticed that as the mathematics advanced, the more it relate to physics? See for example: Line, surface and volume integrals led to Green and Gauss's theorems. Linear algebra with parametric equations, vector transformations. Tensors, spinors and so on.
Well I may be wrong, I don't have a degree on anything. I took algebra in high school ;)
@chrisahc Dude you're idiot math major in their first semester learn calc 1, 2, 3 or go into linear algebra and differentiation of equation, depends how they did in high school. I can tell you aren't a math major because they don't make fun of anyone taking advanced math because they know it hard.
@MarvelsofaLifetime No i agree with you applying to the real world is difficult. But i think you learn math better in the real world then in the classroom.
@shiftplusone80 He did explain exactly what you are talking about, he mentioned that the interference pattern will not be disturbed by the screen. What seems to disturb it is trying to identify which slit the photon goes through, the upper or the lower one and if you could identify that, you would probably find out what exactly causes the interference pattern, It's like it is mocking you huh?
Regarding the double slit experiment. He says that if the system is unobserved, the interference pattern shows up. Isn't the screen a form of observation? I don't get it. Or is he talking about measurement of individual photons as they move through towards the screen?
@xxMafia101 I know some pretty stupid people that no matter how hard they apply themselves will NEVER be geniuses. Bill O'Reilly is a more famous example. Closer to home I would say Brian Cowen or anyone who works in an Irish bank.
I don't like ow students may ask questions during his lecture like you can during community colleges. It shows me that if that where true we could in fact mabye speed up the process of humans getting smarter other then just listening to this profesor speak old work
Hahahaha!! people over 80 and 90 years of age learning quantum mechanics! They should rather go home to relax, take life easy and look forward to jetting out of this physical world (with some degree of quantum application)!
@7olusegun I like to think of it as the general public perceiving the nobility and beauty in science. That an elderly population would choose this over relaxing at home and preparing to die would suggest they aren't finished with their lives and that there is still hope for humanity yet.
If I were their age, I would prefer learning this to sitting at home watching reality tv, playing bingo or peeing themselves in the armchair.
I dont know how you can reverse the magnetics and assume it is the same as reversing time exactly. I believe the magnetic fluctuation while reversing the magnatism would effect the atom.
Grazie prof. Susskind, le sue lezioni sono eccezionali, grazie all'università di Stanford.... (Thank you, prof. Susskind, your lessons are exceptional. Thanks to Stanford University too) ...Luigi from Italy
So, is the uncertainty a property of the system, or simply a function of the fact that right now we lack the ability to measure position / velocity without disturbing the particle? What I am saying is, if there were some way to take measurements without using another particle, would the uncertainty principle cease to exist? Or does it have some deeper meaning than covered here? Might we find some way to measure in the future that does not affect the system, and so 'remove' uncertainty?
Theoretically, I think the uncertainty would disappear if we could measure an electron without disturbing it. But we will always disturb the system by measuring it. Maybe if the effects of the measuring were minimized then the uncertainty would decrease.
All physics professor, including this one, have this 'way' of lecturing the subject that will take 2 hours when the entire topic can be covered in 1 hour. They will repeat and repeat and will express emotions - facials gestures & postponing a topic then returning to the same topic then after 20 minutes they would have covered one basic topic. Why are they 'doing' this to students?
@ohmysoles Because they have a lot more on there minds than what they're saying. It creates a bottleneck of information, and they act funny. Their tongues tend to run of somewhere when they aren't looking.
Also, they aren't used to being face to face with a lot of people. ;p You should check out books instead maybe? Go for Griffith's EM books!
@QuaterionEM the lecturer is pathetic taking 15 minutes to explain what needs 3 minutes of explaining. shows total lack of focused thought (he actually acts like a burned-out, "what was i talking about?"). sounds to me like he is trying to fill the time assigned for the lecture. "You robbed all of us of a nugget of brilliance with that self centered omega mail type move." speak 4 yourself. Nothing brilliant here. Trivial basic QM. You r as pathetic as the lecturer. And a brown-noser as well.
@Satchmo0016 sure did. I call 'em as I see 'em. He could be a great thinker and so on, but he is the worst lecturer. Nothing wrong with that. The fact that he is prominent on his field of endeavor only supports my point of view. Teaching is not his forte. If he was good at both he would likely not be excellent at neither. What is wrong is how many people do not make a critical judgement, and praze a person for everything she does just because she is very good at only one thing.
@QuaternionEM no, I live on the East Coast, I could only dream of being taught by Susskind. And as for laughing, I'm assuming you have experience in the subject matter on some level, other people don't have that experience or even your aptitude, so things aren't as "obvious" to them as it is to you. Also some of these students are older, and may not recall material than younger men like you and I can recall.
0:00 introduction
7:12 introduction to classical and quantum randomness
13:41- double slit experiment
25:56 - deterministic laws and systems with two states or more
33:06 - one slit experiment
dragsigma 4 days ago 2
no offense but it his erratic breathing really gets on the bad side of my ADHD
dragsigma 4 days ago
Well, to answer his first point I'm from North West England - just outside Manchester - so yeah, I'm pretty far away ! lol. Can anyone beat that ?
( maybe everyone should quote where they are watching from so he (the lecturer) can gauge his audience reach.......(?)
d3nv1 1 week ago
@d3nv1 I'm from Lincolnshire! so north east England so i do in fact beat you :p
lawrence123454321 19 hours ago
In my life I "have to" develop some within the physic and music (only as a hobby and only plus the just for fun) ...
PelczarTomasz 2 weeks ago
Thanks Suss
atheistmindtricks 3 weeks ago
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Nice Video That You Share , So Very Nice Thanks You This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics.
fitnesus 3 weeks ago
I Really Like The Video From Your This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics
lupabuatchannel 3 weeks ago
Your Video Is Very Useful Sharing This Stanford Continuing Studies course is the second of a six-quarter sequence of classes exploring the essential theoretical foundations of modern physics
willamricard 3 weeks ago
Quantum mechanics is one among the two keys to
unlock the secrets of The Universe.....the other one is the theory of relativity.........
93889895559 1 month ago
Quantum theory was invented by insecure mathematicians as a tool for exerting their will over those who aren't big enough losers to spend thousands of hours learning insufferably boring and convoluted theories that are obviously false constructions intentionally meant to get revenge on people who spend their time having sex and rolling in meadows and fields, activities that they themselves are in capable of. Have you ever, like, SEEN a quantum entanglement, lol?
version191 1 month ago
@version191 lol ?
Basigek 1 month ago
@version191 yep.. like you
Serinia4melodic 2 weeks ago
I Love The Video It Can Increase My Knowledge Lecture 1 of Leonard Susskind's Modern Physics course concentrating on Quantum Mechanics.
anakmudajaman 1 month ago
Nice Video of Leonard Susskind's Modern Physics course concentrating on Quantum Mechanic That You Share , So Very Nice Thanks You
willamricard 1 month ago
I Really Like The Video of Leonard Susskind's Modern Physics course concentrating on Quantum Mechanics From Your
imegatrone 1 month ago
Your Video Lecture 1 of Leonard Susskind's Modern Physics course concentrating on Quantum Mechanics. Recorded Is Very Useful Sharing
bundawartini 1 month ago
Shoot! 2 extra years in 6 th grade and a near 100 on my IQ test and I still find this hard?
abarhadebar 2 months ago
Zeus.
TheFlamingChips 2 months ago
why u upload everything with 240p
affablegiraffable 2 months ago
Theoretical physics - String theory
"We're going to sell 200 hamburgers today"
"How do you know?"
"Insert long equations to explain 200 hamburger process"
"How much meat do you have?"
"We're not sure, in fact we don't know if we have any at all"
fanuvmxpx 2 months ago
at 0:03:09 when he asks if anyones under 40, i think me! im 13!
hitlersucks101 3 months ago
@hitlersucks101 Cool story bro!
IPlayInBeastMode 2 months ago
im 11yrs old. am i nerdy?
MrCharlieWoods 3 months ago
awesome greater contens.
flowewritharoma 4 months ago in playlist audio book
Dear old wise man with a beard...(dont know your name)Thanks for teaching this.
skipitraplayful 4 months ago
@skipitraplayful His name is Leonard Susskind.
Deathseize 4 months ago
/watch?v=n-mpifTiPV4
huka0104 5 months ago
Thank you Stanford. These lectures are an inspiration for me.
AEVautomatic 5 months ago
@AEVautomatic His name is Lennard Susskind. He´s one of the "creators" of Stringtheory.
8washburn8 4 months ago
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great guy....
simanbrar 5 months ago
Anyone else think of Zakhaev from cod4 when you saw this guy?
JVILGking 5 months ago
get around to it Man !!!
thotforce 5 months ago
Was that Sigourney Weaver at the beginning. I know she went to Stanford.
JoshBHC 5 months ago
Comment removed
rommelfcc 5 months ago
how big/small would an object have to be to follow the rules of quantum mechanics? and what happens at that point where the laws of quantum mechanics stop working and start obeying classical mechanics?
bigqx 6 months ago
@bigqx
like he mentioned, quantum fluctuations can take place in objects as large as bowling balls, but to measure such fluctuations is impossible (not to mention unnecessary) given how miniscule they would be. There is no precise measurement, but quantum mechanics generally is employed at a microscopic level with electrons and other small particles.
It's well known that quantum mechanics and other fields such as general relativity do not mix, and that is a different subject entirely.
FacelessRagdoll 3 months ago
@EIvagabundo Lol, so your teacher was a dumbass and you're just repeating his words. Way to go! Quantum optics, wow, that sounds so cool, you must be so smart :)
MaximPodolsky 6 months ago
What is physics? Physics comes from the ancient Greek word "physika". "Physika" means the science of natural things. And it is there, in ancient Greece, that our story begins.
- It's a warm summer evening, circa 600 BC. You've finished your shopping at the local market, or agora... ...and you look up at the night sky. There you notice some of the stars seem to move, so you name them "planetes," or "wanderer. "
YouCanSeeYourFace 6 months ago 70
@YouCanSeeYourFace
As a scientist myself (with a chemistry and physics background), I assure you that the life of physics does not begin in Greece. I have historical, reputable, documents that the life of mathematics was in the Congo (Africa) and the life of physics is Middle Eastern at best (what we would term "Islamic", today). The Africans, Egyptians, and the West Asians are the cultures who taught the Greeks.
mikedav9O 6 months ago
@mikedav9O i dunno where physics originated, but he's just quoting a tv show called the big bang theory . heres the clip
/watch?v=AEIn3T6nDAo
peetah94 5 months ago
@mikedav9O youcanseeyourface is quoting a scene from "the big bang theory" in which a sheldon (a theoretical physicist) is teach a penny ( a waitress) , as much about as much as he can
MyLIfeStudios 5 months ago
@YouCanSeeYourFace big bang theory?
FuBarracuda 3 months ago
@FuBarracuda Yeah thats all I remember
YouCanSeeYourFace 3 months ago
@YouCanSeeYourFace you got that from the big bang theory
vivlevivle 3 months ago
@YouCanSeeYourFace Bazinga!
yopuck 2 months ago
@YouCanSeeYourFace bahhahahahaah
guitarg0d69 2 months ago
@YouCanSeeYourFace dr Sheldon Cooper
Pr3fixProducts 1 month ago 2
@YouCanSeeYourFace Haha...
Amitknight123 1 month ago
@YouCanSeeYourFace AAAAAAAAAHAHAHAHAHAHAHAHAHA
JackobsnN 1 day ago
i dont agree with his assertions, according to the complex linear vector theroem:
A+B = dxBi - dxB
This is a rare thereom that is not widely used; if it is applied to the vector theory using only direct correlations excluding any randomn variables, you'll find that i*1, is not actually an imaginary numbers because such numbers do exisist in the domain dxB.
hotguy2985 7 months ago
Ok, so if I can't see the crowd...are they really there? It's physics BITCH!
bradakadarb 7 months ago
i got lost at like, half an hour in.. if a light ray (recorder) pushes a photon in the opposite direction, why not use another light ray on the other side of equal force to balance it out?
DaFleegsta 7 months ago
this is probly kindergarden school work to aliens
cportmigo 7 months ago 53
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@cportmigo
I think it's pretty foolish to assume that all aliens must be a great deal more intelligent than us.
chaosdeemon 7 months ago
@cportmigo To them, we are the aliens
lol798 4 months ago
@cportmigo Aliens prefer the intelligent design explanation for Earth. Mainly because they designed it. In fact, our universe is a tenth grade science project by two, rather sloppy, aliens called Fizzbob and Hoother. Science isn't their best subject to be honest, they prefer Nine Dimensional Music.
USERNAMEfieldempty 4 months ago 3
@cportmigo maybe this is past 1000 billion years in thinking to the nearest aliens that are possible to reach with the most advanced technology.
moelex64 1 month ago
This was over 41 people's heads.
UploaderOfGoodMusic 7 months ago in playlist quantum physics lessons
Ok, so one front to work on would be: How to measure, simultaneously, the position and velocity of a particle in a vacuum without bombarding it with other particles/waves (i.e. photons, gasses).
SorenHume 8 months ago
quantum theory is hard to understand,leonard does well to get his subject across to me
AdvancedSniperr 8 months ago
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Futurecop2012 8 months ago
@Futurecop2012 Please apply your baloney detection kit.
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WiiLink89 9 months ago
Now i'm all pumped to crank out some physics problems.
Yourheartjustglows 9 months ago
@Yourheartjustglows smh
786hass 8 months ago
@786hass syf
Yourheartjustglows 8 months ago
@Yourheartjustglows Sex with your girlfriend.
786hass 7 months ago
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@786hass sex with your mom mexican style :)
Yourheartjustglows 7 months ago
Check "Quantum Physics First: Physicists Measure Without Distorting" on ScienceDaily
Photonimus 9 months ago
Quantum mechanic is very hard.
kopi5896 9 months ago
I got B in Physics
saijai587 9 months ago
Thank you
minami935 9 months ago
He has friends his age that don't understand the foundation of quantum physics? I'm 16 and know that.
adrianaesque 9 months ago
@adrianaesque
Sure you do
MrPontiusPilate 8 months ago
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Could quantum mechanics represent the passage or Arrow of Time?
This theory is based on just two postulates,
1.The first is that the quantum wave particle function explained by Schrödinger’s wave equation represents the forward passage of time or Arrow of Time itself photon by photon, quanta by quanta or moment by moment.
2. The second is that Heisenberg’s Uncertainty Principle that is formed by the wave function is the same uncertainty we have with any future event.
nickharvey7 9 months ago
I'm 25
aahuggett 9 months ago
I wonder if most people watch through the whole video
boarding5401 9 months ago
@ 1:27:21 "A BRACKET being what's happen when you put a BRA next to a CAT, is that clear?"
:o)
RoGeorgeRoGeorge 9 months ago
7:41 he said Quier phenomenon! WOA! I
kobg124 10 months ago
physics is a big lie!!
Youdianwuyua 10 months ago
@Youdianwuyua Excuse you? It is most certainly not a lie, dumbass.
adrianaesque 9 months ago
5:18
bluefish8686 10 months ago
Comment removed
bluefish8686 10 months ago
@Elvagabundo you're being an undergraduate physics major doesn't impress me.
mathkills 10 months ago
@EIvagabundo
maybe if you were an actual physicist as opposed to some dude currently majoring in physics, you'd know that hilbert, poincare, gauss, et al were invaluable contributors to the mathematical framework of modern physics, and honestly, how does one call newton a physicist preferentially and not a mathematician, astronomer, alchemist, or bible scholar? oh yeah, because you're biased.
jsn1981 11 months ago
"People in this class are too old to be an undergraduate"
EHEM... : (
Re1Mu2R3 11 months ago
Comment removed
asgerms 10 months ago
@EIvagabundo
maths and physics are the same
deadeyesfallfromgrac 11 months ago
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@deadeyesfallfromgrac math and physics are not the same.
Weightlifeter 10 months ago
@deadeyesfallfromgrac I wouldn't say that at all, Math does not really encompass the experimental aspects of Physics and Physicists who think they can ignore expriment are really not Physicists but something else... maybe mathematicians or maybe just trolls... who knows...
mathkills 10 months ago
@deadeyesfallfromgrac
I don't think math and physics are the same. For example, I can find the average value of a height of a person
and then replace every value in the sum of the heights with that value to find the total height. However, physically, I can't actually replace real people with a theoretical average person. So, to me there is a clear separation between the physical world and the mathematical world.
MathLessonsForFree 10 months ago
@MathLessonsForFree There are physical limitations that apply to natural objects but not theoretical mathematical quantities, which is why your problem arises. Another example would be how the procedure for a fractal such as the mandelbrot can be mathematically represented to an infinite dergee, yet it could only be physically represented (beit by a computer screen, etc.) to a finite degree due to a limitation in the amount of pixels / the resolution of your screen, etc.
IPlayInBeastMode 2 months ago
@MathLessonsForFree Also, a good example is how theoretically in math you can keep dividing a number forever with the equation f(x) = 1/x, y growing smaller and smaller asymptotically to 0, yet NEVER approaching it; however, in real life you cannot divide an item an infinite amount of times, as you would eventually end up with indivisible quarks or whatever the most basic building block of matter may be.
IPlayInBeastMode 2 months ago
@EIvagabundo Math majors aren't looked down upon by all physicists. Only those who are too concerned with politics to care about the actual physics. Also, the vast majority of our computer systems are a product of pure mathematics, as well as major advancements in engineering. If you feel like being a douche, you should remember, you are a physics MAJOR. Not a physicist. so please, oh please, wait until you know what you're talking about before you say it. Or, better yet, don't say anything.
argetsverjar0123 11 months ago
Clear explanation, but excessively slow! If the pace of the lecture was just a bit faster it would be so much better!
shabangbangyo 11 months ago
I am in Texas taking his class. JK
TheBbergner86 11 months ago
Very clear and informative. Just wish the pace was a little faster.
jamma246 11 months ago
Urgh, his use of the word set theory is bad. Classical mechanics doesn't really have anything to do specifically with set theory- if you looked at it that way, quantum mechanics is too, you could just view your vectors as elements of a set.
jamma246 11 months ago
you gotta admit.. this man/Professor has quite the humour! i like him!
gilahappy 11 months ago
Leonard Susskind is a legend!
FallofDarkness55 1 year ago 26
wow so helpful, loved it
Joshden1 1 year ago
yaay, great!
Jipzorowns 1 year ago
Thank you Stanford, keep up the good work!
chshkt 1 year ago
he looks like john malkovich.
bra1nstr 1 year ago
As a homebound disabled person, I offer my sincere gratitude for making these lectures public. Is there a lab, or would that be asking too much? :)
Dragonskin1000 1 year ago
I could teach this better. He made something incredibly interesting into something basically boring. The 70 years olds are sleeping and the 80 year olds are dead. He needs better illustrations, examples and delivery. Then again, he teaches at Stanford and I don't.
proconsulaugustus 1 year ago
AFTER LISTENING THE SECOND AND THIRD LECTURES, I REALIZE THAT SUSSKIND IS A PRETTY GOOD LECTURER AND KNOWN WHAT HE IS TEACHING VERY WELL. HE ALSO HAS A GIFT FOR TEACHING AND A GREAT SENSE OF HUMOR. I DEFINITELY CAME AROUND IN MY RASH OPINION OVER THIS EXCELLENT PHYSICIST AND PROFESSOR. I AM GLAD I LIKE HIM FOR HE HAS A LOT TO TEACH.
nementerc 1 year ago
sqrt(-1)= i, its called an imaginary number
Herbiewvu 1 year ago
@Herbiewvu congrats, you passed algebra 2... jk haha
Ichvyenichalster 7 months ago
@Schilcote That's the best answer anybody has ever given me regarding anything. I salute you.
DiosGX 1 year ago
I can’t wait until I finish learning Linear Algebra and Differential Equations from the Khan Academy; I will finally be able to learn this stuff and perhaps, even contribute to the field.
MarvelsofaLifetime 1 year ago
Seems like some smart folks up in this bitch. Here's a question for anybody who reads this: What would happen if a Neutron Star were to pass into a black hole's event horizon? What would the singularity become? Would it be its own unique element? Would the black hole explode and create a new series of physics specific to the borders OF that event horizon?
DiosGX 1 year ago
@DiosGX CONT;
Or, would a megaton neutron star's rapidly oscillating x-ray photons tell the black hole to get fucked and start to erode it? I dunno, doesn't seem like a neutron star and black hole are ever going to collide in a controled environment, so, just curious what others' informed opinions dictate.
DiosGX 1 year ago
@DiosGX big bang. d:
ilovezcheeze 1 year ago
@DiosGX: The Black Hole’s event horizon would simply become bigger because by “swallowing” the Neutron Star, consequently the Black Hole would become more massive – more massive means more gravitational influence, and more gravitational influence means a bigger gravitational field and overall event horizon. Also, I may be wrong, but I think that the singularity wouldn’t grow in size; it would simply become denser.
MarvelsofaLifetime 1 year ago
@MarvelsofaLifetime While I absolutely agree with your concept that its singularity would grow denser, as not much else makes sense, I have a question (maybe a challenge?) regarding its gravitational field. While I know all things possess a center of gravity and a gravitational field (does the word "Flux" apply here? I don't know to be honest), I think I may simply have misread what you mean.
You don't mean to say black holes pull things toward them do you? Like, PRIOR to the event horizon?
DiosGX 1 year ago
@DiosGX black holes do pull things toward them prior to the event horizon. The event horizon is simply the point which gravity becomes too strong for light to escape, and therefor to strong for anything to escape (the sole exception being quantum tunneling effects do to the statistical wave nature of photons) A black hole has a gravitation field that extends far into space just as any object with mass does.
ngilliam12345 11 months ago
@ngilliam12345 if by "pull things toward them" you mean warp space time so that at the event horizon all timelike trajectories move toward the singularity, then you would be correct. Its just an oddity of general relativity that the "force"exerted by gravity is actually a warping of spacetime, not a force like we see in electromagnetism. Otherwise, you would feel the earth pulling on you right now and you really don't, in fact you feel it pushing you away from your inertial path.
mathkills 10 months ago
As a math major, this shit is fucking easy. Are physicists retards or something? Mathematicians learn all this stuff in the first semester.
chrisahc 1 year ago
@chrisahc YOU DON'T KNOW SHIT FAGGOT
hogansegalkaluse 1 year ago
@chrisahc Well you don't know physics then. What you saw here is the ABC or the 123 of advanced physics. You major in math right? Have you noticed that as the mathematics advanced, the more it relate to physics? See for example: Line, surface and volume integrals led to Green and Gauss's theorems. Linear algebra with parametric equations, vector transformations. Tensors, spinors and so on.
Well I may be wrong, I don't have a degree on anything. I took algebra in high school ;)
quantomic1106 1 year ago
@chrisahc Dude you're idiot math major in their first semester learn calc 1, 2, 3 or go into linear algebra and differentiation of equation, depends how they did in high school. I can tell you aren't a math major because they don't make fun of anyone taking advanced math because they know it hard.
Jmerino7 1 year ago
@Jmerino7: Math is easy, it’s applying it to the real world which is difficult. Just my opinion, hate it if you like.
MarvelsofaLifetime 1 year ago
@MarvelsofaLifetime No i agree with you applying to the real world is difficult. But i think you learn math better in the real world then in the classroom.
Jmerino7 1 year ago
if a tree falls in the forest and no one is around, does it really make a sound
ezcondition 1 year ago
@ezcondition LOOL
omnimaster1 1 year ago
@ezcondition yes
FathomLordKarathr 8 months ago
@xxmafia101 Someone who works for comcast customer service would not be a genius.
harmonicdog 1 year ago
This guy sounds like he's smart.
youngdones 1 year ago
@shiftplusone80 He did explain exactly what you are talking about, he mentioned that the interference pattern will not be disturbed by the screen. What seems to disturb it is trying to identify which slit the photon goes through, the upper or the lower one and if you could identify that, you would probably find out what exactly causes the interference pattern, It's like it is mocking you huh?
Killuminatyi 1 year ago
Comment removed
LennyLeonard85 1 year ago
Regarding the double slit experiment. He says that if the system is unobserved, the interference pattern shows up. Isn't the screen a form of observation? I don't get it. Or is he talking about measurement of individual photons as they move through towards the screen?
shiftplusone80 1 year ago
Is this guy smart? Don't you have to be a genius to do quantum physics?
youngdones 1 year ago
@youngdones That's the dumbest question I have ever heard. Anyone can be a genius. You only have to apply yourself.
xxMafia101 1 year ago
@xxMafia101 well it is a stupid question but i dont agree that everyone can be a genius
kiselstein15 1 year ago
@xxMafia101 I know some pretty stupid people that no matter how hard they apply themselves will NEVER be geniuses. Bill O'Reilly is a more famous example. Closer to home I would say Brian Cowen or anyone who works in an Irish bank.
Etcher 1 year ago
This guy's Bronx accent is awesome.
MathLessonsForFree 1 year ago
I don't like ow students may ask questions during his lecture like you can during community colleges. It shows me that if that where true we could in fact mabye speed up the process of humans getting smarter other then just listening to this profesor speak old work
thepeach12345 1 year ago
Hahahaha!! people over 80 and 90 years of age learning quantum mechanics! They should rather go home to relax, take life easy and look forward to jetting out of this physical world (with some degree of quantum application)!
7olusegun 1 year ago
@7olusegun I like to think of it as the general public perceiving the nobility and beauty in science. That an elderly population would choose this over relaxing at home and preparing to die would suggest they aren't finished with their lives and that there is still hope for humanity yet.
If I were their age, I would prefer learning this to sitting at home watching reality tv, playing bingo or peeing themselves in the armchair.
Standuble 11 months ago
I like this video but It seems to be a Vectorial Spaces from Algebra I at University and not a Physics class.
BedThife 1 year ago
why am i watching this i am in the ninth grade IN AMERICA i dont get why i am here im not even very smart
mrjammed 1 year ago
@mrjammed thats the issue with american society I was researching some stuff like this when i was your age
Generalofmetal 1 year ago
good but volume is too quiet
greatorderofchaos 1 year ago 13
@greatorderofchaos Volume is okay.
idricool 1 year ago
@greatorderofchaos put head phones.. it works better..
JonnyChannel 9 months ago
I dont know how you can reverse the magnetics and assume it is the same as reversing time exactly. I believe the magnetic fluctuation while reversing the magnatism would effect the atom.
ludachristo 1 year ago
Grazie prof. Susskind, le sue lezioni sono eccezionali, grazie all'università di Stanford.... (Thank you, prof. Susskind, your lessons are exceptional. Thanks to Stanford University too) ...Luigi from Italy
lupi2000 1 year ago
So, is the uncertainty a property of the system, or simply a function of the fact that right now we lack the ability to measure position / velocity without disturbing the particle? What I am saying is, if there were some way to take measurements without using another particle, would the uncertainty principle cease to exist? Or does it have some deeper meaning than covered here? Might we find some way to measure in the future that does not affect the system, and so 'remove' uncertainty?
unimoggie 1 year ago
@unimoggie
Theoretically, I think the uncertainty would disappear if we could measure an electron without disturbing it. But we will always disturb the system by measuring it. Maybe if the effects of the measuring were minimized then the uncertainty would decrease.
I'm not positive. I'm just speculating.
MRJerrod410 1 year ago
@MRJerrod410 you're speculating logically but incorrectly, not your fault you're not a physicist, but the uncertainty principle is absolute.
ryank8843 1 year ago
This has been flagged as spam show
Jesus fucking christ can this guy ramble on anymore? Get on with the fucking quantum physics. Fuck this idiot.
mikeprosser81 1 year ago
All physics professor, including this one, have this 'way' of lecturing the subject that will take 2 hours when the entire topic can be covered in 1 hour. They will repeat and repeat and will express emotions - facials gestures & postponing a topic then returning to the same topic then after 20 minutes they would have covered one basic topic. Why are they 'doing' this to students?
ohmysoles 1 year ago
@ohmysoles Because they have a lot more on there minds than what they're saying. It creates a bottleneck of information, and they act funny. Their tongues tend to run of somewhere when they aren't looking.
Also, they aren't used to being face to face with a lot of people. ;p You should check out books instead maybe? Go for Griffith's EM books!
RobotTed 1 year ago
At 44:31 did anyone get the question that was asked? The lecture changes when he answers it and i'm trying to follow.
bigchunk1 1 year ago
find the higgs boson please... or not, either 1 is fine, thnx :)
bmw200000 1 year ago
What happens if there is sceond particle in this circle with the slopping lambda?
sashetoa 1 year ago
Great Stuff
gregthesenior12 1 year ago
@QuaterionEM the lecturer is pathetic taking 15 minutes to explain what needs 3 minutes of explaining. shows total lack of focused thought (he actually acts like a burned-out, "what was i talking about?"). sounds to me like he is trying to fill the time assigned for the lecture. "You robbed all of us of a nugget of brilliance with that self centered omega mail type move." speak 4 yourself. Nothing brilliant here. Trivial basic QM. You r as pathetic as the lecturer. And a brown-noser as well.
TheSupatrader 1 year ago
@TheSupatrader Did you seriously just call Leonard Susskind pathetic? Wow.
Satchmo0016 1 year ago
@Satchmo0016 sure did. I call 'em as I see 'em. He could be a great thinker and so on, but he is the worst lecturer. Nothing wrong with that. The fact that he is prominent on his field of endeavor only supports my point of view. Teaching is not his forte. If he was good at both he would likely not be excellent at neither. What is wrong is how many people do not make a critical judgement, and praze a person for everything she does just because she is very good at only one thing.
TheSupatrader 1 year ago
@TheSupatrader
Do you even know any modern physics or are you
just some numb-nut squirreling around the internet?
I've had many bad-ass professors before and
Dr Susskind lectures as well as the best of them
in my opinion.
You get up there and try to explain QM in a lucid manner.
I think he nailed it.
QuaternionEM 1 year ago
This has been flagged as spam show
BREAKING NEWS:American President Obama & the Lunatic Mossad Agent
/watch?v=24UYXgu5l6Y
VisitorUploads 1 year ago
@QuaterionEM hush you elitist prick, learning is asking questions.
MuTaziliTajdid 1 year ago
@MuTaziliTajdid
You're right...it was a knee-jerk response to finding these
awesome lectures...I even spelled Quaternion wrong.
Some of these questions and comments make me
laugh my elitist laugh though.
I guess it just comes easy for me,
Was that you that asked the original question that
I made fun of ?
If so ...sorry if I hurt your feelings
QuaternionEM 1 year ago
@QuaternionEM no, I live on the East Coast, I could only dream of being taught by Susskind. And as for laughing, I'm assuming you have experience in the subject matter on some level, other people don't have that experience or even your aptitude, so things aren't as "obvious" to them as it is to you. Also some of these students are older, and may not recall material than younger men like you and I can recall.
MuTaziliTajdid 1 year ago
@MuTaziliTajdid
I'm being kind of silly........just playing a character.
But I really do like these lectures.
I just finished watching all the Entanglement videos
(while taking notes and working problems)
Now I'm ready for this sequence.
I am pretty saturated though...
.....gotta love it.
The egghead lifestyle.
;)
QuaternionEM 1 year ago
@MuTaziliTajdid
I'm just being silly on the internet.....thickening peoples skin...
;)
Actually some of the questions are really really good.
I just finished the Entanglement lectures complete with
notes and examples. Now I'm ready for this series.
One week! That's what I give myself to finish.
No sleep till Hammersmith!
QuaternionEM 1 year ago