Lecture - 1 Introduction to Quantum Physics;Heisenberg''s uncertainty principle

[TheMatthewSellers]

I understood everything he said.

[ihmpall]

This was better than the MIT lecture.Brilliant :)

[mckeesk]

the most important point out of this hour is that mathematics is the language of QM. the "problems" are semantical. in the right language (mathematics) the contradictions pass away.

[Molkatoftime]

Hi. I'm twelve. I understood this to 0:07:58 . Is that a bad thing?

[sbergman27]

While our knowledge of the particulars of Dark Matter & Dark Energy is limited, it is impressive & encouraging that we've developed a theoretical framework robust enough to *tell us* not only that DM & DE exist, but also their proportions to an impressive degree of accuracy. We *do* know something about them. Especially DM. It's probably a particle, similar to the neutrino, but more massive (cold, not hot). It may interact via the weak force, like the neutrino. Or it may not. We're doing fine.

[MrGibberoni]

Watching this to put off Strategic Management work...

[Ultimateshizer]

Arrived.

Got Mindfucked.

Left.

[spinbaba]

When there was nothing, there was Ohm's Law.

[gtrrobster]

@spinbaba

good one :)

[a3th3r]

good professor

[perceptualchaos]

Doesn't anyone have a syllabus for this course? I find it really distracting how they don't have a webpage for the course like MIT and Stanford do.

[destructo12311]

I liked the book better..

[ChristopherAddams]

I Googled "ways to fall asleep" ...

[yemdd]

Unfortunate that I didn't find these lectures earlier. This is amazing and I would certainly complete the lecture series.

[asifadio]

this is the best professor i ever seen.. im from Malaysia.. best regard for him

[xGodsOfAnarchyx]

who watched the wole thing?

[CapnIronBeard]

this university has a ballin theme tune

[RemnantMusicOfficial]

I didn't think Boyinaband was seriously gonna send me to a quantum physics video... Wow...

[BackBurner144]

@RemnantMusicOfficial i know right?

[VEGAZme]

DUDE WHAT THA FUCK

[FreakmundZoid]

Did I see Abed in there? So, that's what he's doing during the hiatus ^^

[harrysadlermusic]

Did Dave write the music for this? LOL

[Kazshmir]

I'm not sure what that 1 minute intro was all about :S

[RomaineRC]

yaya yaya ya yaya no noo nonoo no no no 29:00

[RomaineRC]

why x and p, why nott x and y like normal people?

[RomaineRC]

What the actual boink

[RubbaDuckaZillaVEVO]

Boyinaband sent me here...

[x1x2x3ct]

this is as joke

[maujo2009]

nptelhrd, PLEASE UPLOAD MORE VIDEOS OF DR. BALAKRISHNAN'S LECTURES!!!! PLEASE!!!!

[enigmaPL]

Good lesson, shame that class looks dead

[anakmudajaman]

I Love The Video Lecture - 1 Introduction to Quantum Physics;Heisenberg''s uncertainty principle It Can Increase My Knowledge

[willamricard]

Nice Video Lecture Series on Quantum Physics by Prof.V.Balakrishnan, Department of Physics, IIT Madras That You Share , So Very Nice Thanks You

[imegatrone]

I Really Like The Video Lecture Series on Quantum Physics by Prof.V.Balakrishnan From Your

[bundawartini]

Your Video Lecture Series on Quantum Physics by Prof.V.Balakrishnan, Department of Physics, IIT Madras Is Very Useful Sharing

[svallam]

Can anyone answer my question:

Why the uncertainty is property of the particles than the limited choices we have to measure it accurately?

If we have light source that doesn't change the momentum of a particle, then it is not uncertain anymore right?

I feel that it is a limitation of tools we have.. not true?

[maujo2009]

@svallam That's what the evidence shows. Period.

[svallam]

@maujo2009

Thanks. Does it mean that it is not predetermined as Einstein thought?

[maujo2009]

@svallam Yes. He never could cope with that idea and rejected QM.

[italiangrl3343]

@svallam

i can only answer 2. i guess in theory that would be possible, but the thing is is that light sources DO change the momentum of the particle and we can't find the position of the particle without light so this would be a hard one to work around.

[nithinpathroses]

but Sir im not believe Big Bang Theory :)

[raketapjotr]

thumbs up for the intro

[Pentazoid111]

∆E ∆t ≥ h/2π.

[WinterXL]

What's that candle and rose and scary chanting all about? D:

[Akhil1191]

@WinterXL It's a chant from Vedas that Hindus say before Studying.

It means...

May God Protect us Both (the Teacher and the Student),

May God Nourish us Both,

May we Work Together with Energy and Vigour,

May our Study be Enlightening, not giving rise to Hostility,

Om, Peace, Peace, Peace.

[WinterXL]

@Akhil1191 Oh, that's quite interesting. Thanks for telling me!

[Jsimp0487]

I find this quite easy to masturbate to...

[TheSureshaa]

wow, watch the first four lectures of Susskind and come to these ones..... as the lectures by susskind is more of things from scratch and creates a good basis to understand the ones by Balakrishnan . Both of them rocks in their own way....



[heavymetaldeath4life]

What's with the Hindu theme in the beginning?

[chrismx24]

The beginning is way to creepy.

[HumaneAnon]

It takes double the foucs to listen to this accent. What a task to be sitting through this for an hour despite the great topic. I remember having TAs who talked like this. Communication was terrible.

[Murtydattu27]

Purposeful video lectures

[prab661987]

Hi Friends,

I am interested in learning quantum physics.But the video seems greek and latin for me. Any suggestion for preparing ground before watching this video?

[nipuna666]

@prab661987 Find good textbooks/websites. Start with basic maths and algebra, and move on to calculus. Study basic physics including mechanics, electricity/magnetism, waves and the a bit of thermodynamics. It may sound like a lot, but once you're familiar with the concepts you'll have a better understanding.

And keep trying. Practice, practice, practice and then practice some more. Don't give up. It might take longer than you expect but it's absolutely worth it!

[MrNicMachiavelli]

Thank you to the person who posted this lecture.

[truesemite]

you gotta love the Indian-English accent !

[theerdinc555]

why the hell is there only one girl in that damn class?

[etizzei1]

lol i clicked on this video cuz i was bored and i really like quantum physics,but i dont get most of it 0.o im in high school chemistry so maybe thats why

[nickharvey7]

I am an artist and when I create a work of art it takes energy and is a process over a period of time ∆E ∆t ≥ h/2π. There is always uncertainty ∆×∆p×≥h/4π of how the art work will turn out in three dimensional (4π spherical) space the position of the lines and curves π on the canvas. Every movement I make will have to start at the quantum level and will have an uncertainty of momentum and position therefore is Heisenberg's Uncertainty Principle the same uncertainty we have with any future event?

[canceodgr8]

@ukvaishnav why cant it be possible? v=0 implies stationary particle, and so std. deviation for x = infinity!!??? what does that mean??

[canceodgr8]

what if we have a stationary particle?? as in v=0, then will delta(x)=infinity?

[ukvaishnav]

@canceodgr8 well this is just a hypothetical problem it only implies that v =0 can not be possible.

[MrPhysicalchemistry]

I had gone through the first 29 lectures in this series, and those entire section was exemplary. Am really feeling jealous to the students in the class, i know they are talented, because they have got a professor like him. I didn't get the reason why one of our union minister,he is also from iit, had made some slanderous remark about this exceptional persons. Our minister had to spend a little time in front of NPTELvideos before making those kind of egregious remark.

.

[cperez1000]

who the FUCK doesn't like this?

[saurabhCherished]

@cperez1000

It's lengthy procedure to find this specific playlist out of those tons of NPTELHRD playlists.

Thanks ! you saved my time.

[esraretin]

zakir naik was easy:)

[IAMSOHELlive]

the best teacher of quantum mechanics ever...

[motherforkingcactus]

i dont even understand his accent and i even know he dont really know wat hes talking about !!!!

[archieh70]

@motherforkingcactus You need to go and do a course on basic reading and writing skills before you start commenting on videos about Quantum Physics.

[nayneshdev]

(Mathematics)^{T} (Balakrishnan) (Physics) = 1

where 1 (in the language of this genius human) is a unit matrix

[GordDavison]

Excellent. Very clear

[kepler5813]

OK. What quantum mechanics or quantum physics says is that nothing exists without consciousness. Therefore, for your particular subject, take out what you need from quantum theory - as long as you never depart from sacred geometry, which is fractal and infinite.

[jcfbell3001]

i love how i can listen to hours of lecture, read all the assigned textbooks about a subject, and still not be able to solve a single problem until i translate and organize it all for myself....f-cking professors are a waste of time...unless you already know the subject, and are looking for a mere commentary to nuance what you already know...

[mitchqqqqqq]

breaking bad

[Vape4life]

my head hurts

[hithesp]

its one of the rarest opportunity for a man like me to sit and enjoy the class of a iit professor. thankx youtube u made it possible, thankx iits and issa you made it possible thankx professor u made it possible. thankx nptel you made it possible. at last but bot the least thankx simat you made it possible.

[tmsatisar]

I am zero in the physics. but believe me, i could not close this video even though i was not comfortable with the quantum vocabulary. Can there not a systamatic courses where laymen like me can be taught.

who knows one among the laymen may come out brighter than many in IITs in the abstract sciences like quantum mechanics because subtleity is not directly proportional to how much you know about physics books.

[dirtymussh]

Does anyone know where I can find online tutorials/lectures on the maths tool you need to use in a physics degree? Like he mentions about Poisson brackets and things...?

[SamuelSlowMotionTV]

the ratings bar looks like a lightsaber o.O

[sillychops]

@SamuelSlowMotionTV someone i can relate to

[SamuelSlowMotionTV]

@sillychops lol

[lypse14]

I wish I had this guy as my prof for classical mechanics and quantum mechanics...he's so clear and explains everything so well

[monoottan2000]

gr8 mind blowing. any chance to get cd or dvd of these lectures? pls inform it would be helpfull for many

[harryvas]

@monoottan2000

you can order dvds on NPTEL website. gogole it.

[harryvas]

you can order DVDs from the NPTEL website. I cannot post the link here because you won't let me.

[PUARERE]

This is an excellent lecturer, by far, as he asks for feedback often, and then fills in the gaps where students need help. He also explains things mathematically very well. Well done.

[123Apocalypto]

Thank you :)

[TheFaithseeker]

It still appears very difficult to me :(

[TheProf1988]

Mind: Blown

science ftw!!!

[BiancaAngie96]

Okay, so i'm a Soph. in high school...yet this professor explains in such a way that I can understand! i'm amazed. He is great.

[Futurecop2012]

A YOUTUBE video "UFO Disclosure A Global Deception Conspiracy "

reveals hidden awaremess of life outside Earth by politicians,

astronauts, American presidents, military personnel, along

with aired UFO news footage. This compilation contains planned

revelations about free energy technology, initiated first contact

along with current and ongoing E.T. presence which is being hidden

from the public + more.

[sriabitha]

really very gud job.....!!!!

I start loving quantum physics

Thanks a lot to tis pof

[john17972]

The intro music is a waste of time.

[vdofam]

this should be on at 8pm instead of fing American Idol crap. If everyone learned science we wouldnt be so damn stupid.

[ZOMBIESLAYER9199]

who actually whatches this crap!!!!!

[bigmac575]

@ZOMBIESLAYER9199 people of much higher thinking than yourself sir.

[BiancaAngie96]

@bigmac575 agreed.

[1Mperios]

@ZOMBIESLAYER9199

Not you, I guess?

[foroparapente]

@ZOMBIESLAYER9199 No-one. The professor of this class just reloaded this youtube screen 230.000 times to become popular and get some pussy. Probably worked, you should become a physicist yourself!

[TheKennyMas]

AWESOME!!!!!

[jfdomega]

Great lecture' this guy has a rare way of making he's lectures very interesting. Also he comes across as a really nice guy. Brilliant the way he breaks down the question completely before attempting to answer it. 10/10

[Mattprole]

Having watched the majority of the classical physics lectures conducted by Prof.V.Balakrishnan, I feel like I've learned so much. The way he runs through the material is simply amazing; apparently he has all the derivation methods and formulas memorized, which is really impressive. This guy is just a beast. A mythical character that should be revered by the whole of the Internets.

[djrk2011]

please read concepts of MODERN PHYSICS BY ARTHUR BEISER

IT WILL BE AN EYE OPENING EXPERIANCE.

ASK THE PROFESSOR IF HE KNOWS ABOUT FOLD MANIFESTATION

AND ITS APPLICATIONS TO QUANTUM MECHANICS.MY EMAIL ID IS djrksin@yahoo.in.YOU CAN GUESS HOW SMART I AM BY MY EMAIL ID.

[djrk2011]

please read concepts of MODERN PHYSICS BY ARTHUR BEISER

IT WILL BE AN EYE OPENING EXPERIANCE.

ASK THE PROFESSOR IF HE KNOWS ABOUT FOLD MANIFESTATION

AND ITS APPLICATIONS TO QUANTUM MECHANICS.

[QuesUtDeus]

The Universe demonstrates obvious representations of relative central points of mass; solar systems and galaxies, central points of mass that are still not understood in relation to quantum mechanics because scientist cannot detect the particles that define them with physical instruments. Each and every particle of electromagnetic energy exhibits a central point of mass or gravitates to a central point of mass. I do not understand this professors disposition.

[subash3]

omg. This lecturer has weird and genius family. his wife is theoretical physicist as well, his son is Professor in the Department of Electrical Engineering and Computer Science at MIT and his daughter is a faculty member at MIT in the Department of Aeronautics and Astronautics.

[riskitonme]

@subash3 wow....



[smallblueclouds]

@subash3

Fuck that, my mum has never worked in her life, my dad is a petty thief and my brother is in prison for attempted arson - and yet even with all these drawbacks I have managed, largely under my own volition, to become an alcoholic.

That takes skill.

[dj1shiftie]

@smallblueclouds Hell Yea!!

[smallblueclouds]

@dj1shiftie

Too right brother !!

: )

[Starkl3t]

@smallblueclouds Excuse me while I scroll through endless comments to find out what subas3 said.

[AINT2COMMON]

@smallblueclouds I have not read this entire thread, but this post cracked me up. You, my friend, are indeed gifted

[TheTimeTraveler100]

@subash3 Why weird?

[wolflover8765]

@subash3 STALKER! sorry, yeah really that is pretty epic

[Deliwio]

FUCK THE UNCERTAINTY PRINCIPLE DAMIT!!!!!

[adrianenrique614]

Excellent!

[RestingMyChemistry]

In nature, time must move in 'quantum' steps as it progresses. It's the definition of time that we must call into question. The product of the position and momentum of a particle can be 0. It's time moving in these quantum leaps giving rise to the uncertainty. Therefore:

(dX) (dPx) >= h / 2 changes to (dX) (dPx) >= 0

and

(dT) >= h c / λ

In other words, time progresses forward in discreet amounts defined by h c / λ .

[whoanonstop]

@RestingMyChemistry I'm not sure where this comment originated from, but this can not be a valid statement. Why? The value of h * c / λ is not a unit of time, it's a unit of energy. The corresponding uncertainty principle for time is related with energy and although I'm rusty on the subject, regardless if time moves in 'quantum' steps or not, (dx)(dPx) >= h/2, not zero.

[5dsdouglas]

@RestingMyChemistry could you explain why the product can be 0. I may have missed it, but I didn't hear such a statement in the lecture. I'm new to this subject and your explanation will be helpful. Thanks

[blueeagleTFL]

he lost me at 06:05

[TheAdithi007]

Good teaching sir. I am in higher secondary and i can understand it.

Keep rocking sir..

[chemicalx00]

wow, amazing. so much better than my lecturer

[Bar0k]

so if you define (dx)(dPy)=0 then doesn't this constitute origin of the particle then why is it still uncertainty since value is at origin or point 0?

[5dsdouglas]

@Bar0k I think he said if one is set a 0 then the other goes to infinity, resulting in uncertainty. New to this subject so I could be wrong.

[1saurabhvaidya1]

great professor.!!

[sharinganclan213]

so athene watched this vid?

[nementerc]

I HAVE ATTENDED LECTURES IN VARIOUS UNIVERSITIES INCLUDING MIT, HARVARD AND YALE,ETC( INCLUDING LEWIN AND DIRAC LECTURES) AND HAD SOME EXCELLENT TEACHERS. DR. V.BALAKRISHNA IS OUTSTANDING IN MY OPINION. PERFECT DOMINION OF ENGLISH,CLARITY OF MIND, MODESTY AND UNCOMPROMISING PROBING OF ISSUES AS WELL AS WONDERFUL INTERACTION WITH STUDENTS. WOW! I WISH I HAD SEEN THE LIKES OF HALF A DOZEN PROFESSORS LIKE HIM. GREAT!!!.

[prashanttendulkar]

@nementerc --i hav listen lecture of lewin.he is outstanding.....are you talking about paul dirac..?

[kehlful]

Exceptional Professor. Clarity, simplicity and depth---great delivery!

[kehlful]

Exceptional Professor. Clarity, simplicity and depth---great delivery!

[nocciola123456789]

11 engeneers watched this video...

[evankiefl]

@nocciola123456789 kill yourself.

[nocciola123456789]

@evankiefl Mr. Goebbels, I suppose...

[liketheuniverse11]

Thank you, professor! Knowledge is always better than ignorance! If all the people could be reading, learning about how wonderful is nature, the universe, every tiny creation of God, the incredibly organized atoms, molecules, etc, this world would be a happier place to live on!!! People would be way more understanding!! Congratulations for your great work!!! God bless you!!! :)

[chesley69]

Blah blah blah to death. All of this speculation is utterly meaningless. Doesn't affect day-to-day existence one iota. Never has, never will. Just a way for some university and college professors to make a living for nothing.

[ThursdayEnterprise]

@chesley69 Flash memory is erased using quantum tunneling. Plus quantum computing, sure a practical quantum computer is not here yet, but don't you think it calls for research? The gains in efficiency could be quite large. LARGE!!!!

[nocciola123456789]

@chesley69 Mr. Ratzinger, i suppose...

[JulioMarco]

@nocciola123456789 No... I guess Ratzinger would completely disagree with him.

Actually, Ratzinger is of the opinion that science and religion are not contradictory and may even suffer from the same "thought diseases" (totalitarianism, to be more specific).

I guess our friend is just unaware of the practical implications of physics... not his fault! Our educational institutes clap hands to science, but fail to make its concepts available for all.

[pigeonkid4]

@chesley69 How do you think your computer got built?

[cosg9531]

@pigeonkid4 My computer was built by foreigners in sweatshops who were paid 25 cents a day, the same as everyone else's.

[pigeonkid4]

@cosg9531

I'm talking about transistor/microchip technology

[groundnpound702]

is there a way to download this lecture?

[yp06407012]

@groundnpound702, yes you can download the lecture by using the FireFox browser and and add-on called "downloadhelper". what is firefox, what is add-on, how to install add-ons, etc... all these questions can be answered by google search.

[neozenx]

Awesome lecture..!!!

[ThisLittleBlackBook]

great vid!

[RAYtheIMAN]

I watched this to learn about quantum physics and I learned a lot

[YamaKazoo]

@ 33:03 , Lay of the weed man !!

[TheTnuggs]

do u have to be a genius to be a physicist ?

[hvutrong]

@TheTnuggs absolutely not. But you have to try to understand the subject in depth, not just be able to solve textbook problems.

[TheTnuggs]

@hvutrong lol ok i know im a lil smart but im no where near genius ad i started to learn about this stuff and its actually really fun and im considering it for a career path if i can survie the university

[RAYtheIMAN]

@TheTnuggs

Albert Einstein was once thought as mentally challenged

[lrcdert2010]

He's a genius,talking with such simplicity.

[GelandnaleG]

3:02

[MrRoeilevy]

Great lecture by a great professor. thanks a lot.

[Sanmi4real]

10 viewers must have Down's syndrome. . . and missed the Like button

[hypnotix2000]

Wow @ 8:07!

[TeunisD]

Is this explainable in 5 minutes?

[maxdelbruck]

Wonderful lecture. The chick in green is hot. A "passing comet will change your operators." Ha ha beautiful. I t makes me laugh.

[maxdelbruck]

Wonderful lecture. The chick in green is hot.