Feynman on Wave Particle Duality (QED Lecture in New Zealand)

[dzsquared1]

Lousy athiest.

[HybridD91]

I wave at passing particles. Bam son! Where's my Nobel Prize :P?

[ccase2k]

The first person to ever make quantum physics seem rational.

[Randseed2]

The best explanation of this I've ever heard.

[DonCorleoneQ8]

if the audience didn't understand after this lecture.

Feynman would send Luca brasi

[propoetide]

"We calculate as if the light is a wave, but we interpret the intensity of the wave, what used to be called the energy density of the wave, not as the intensity of the light, but as the probability of finding a photon.

It's that duality of interpretation that produces the difficulty."

[billymatsumoto]

ok?

[jib2182]

What.

[LoquaciousApe]

All of Feynman's lectures are archived on Project Tuva. It'll ask you to install Microsoft Silverlight to be able to watch the videos, which some people don't like, but it will definitely be worth it if you are inspired by Feynman and like his approach to physics.

[nikanj]

@LoquaciousApe

I think Project Tuva only host a series of lectures called The Character of Physical Law given by Feynman at Cornell. It would be amazing if Bill Gates bought the rest of them :).

[Jipzorowns]

my god, he explains this so well!

[bestdamntutoring]

"Mathematics is to Physics as masturbation is to sex." RPF

[azzy314159]

@bestdamntutoring This is pure balderdash

[bestdamntutoring]

@azzy314159 That he said the thing or the assertion itself? I had it backwards actually, it was "Physics is to math what sex is to masturbation." RPF

I'm sure he was just needling some friend of his.

[cxrodformrx]

what year was this video taken?

[jackp22]

@cxrodformrx 1979

[gvsfgdf]

I am so glad I'm a physics major...

[bouzaglo3]

video.google.com/videoplay?doc­id=1501838765715417418#

you have all the fuuls kecutre in here in googl video if you want too see

[MsJustanotherhuman]

ty 

[AngelaaSiuay331]

hehê_i_fêêl_sö_løNÈlY_tÕÐäÿ

[DJBigz1988]

i don't understand somethings he talks about in his videos, but i always enjoy listening to him.

[tyronejonez01]

ALL WAVES ARE MADE OF PARTICLES

WAVE = RESONATE BUNCH OF PARTICLES

TIME IS A SUB SET OF GRAVITY

TIME IS RADIATED LIKE GRAVITY

NO GRAVITY NO TIME NO TIME NO ENERGY.

RED SHIFT IS A FUNCTION OF GRAVITY BENDING LIGHT.

ATOMS RADIATE EVERYTHING INCLUDING GRAVITY IN TWO POLARITIES.

WE CANNOT "SEE" THE OTHER HALF OF THE UNIVERSE, THAT IS WHEN THE QUANTUM LEAP OCCURS:)

[AtheismandSkepticism]

@tyronejonez01 Amazing hypothesis...

Now, all you got to do is write it up and submit it to a peer reviewed physics journal, with sufficient evidence, and theoretical background and wait for you Nobel prize!

[tyronejonez01]

@AtheismandSkepticism FORGET THE MEDAL JUST SHOW ME THE MONEY. GOOD THING THE QUEEN IZZY

OF SPAIN WAS NOT A SKEPTIC OR MY ANCESTORS WOULD NOT HAVE HAD THE PLEASURE OF MEASLES AND SKEPTICS.

[cryptickripke]

@tyronejonez01 TIMECUBE IS TRUTH

[TookMe20min2findThis]

@tyronejonez01

WAVE = RESONATE BUNCH OF PARTICLES

OK, so water waves resonate water molecules, same for air (pressure) waves that resonates air molecules and so on..

But how about EM waves? What are those particles resonating? Photons? Are photons already present throughout space in a static state before they get "energized" ? Or are they emitted as it is common to believe they are. Where is the ether!!? Where is the dam medium!

I guess no one really knows what those waves are made FROM.

[tyronejonez01]

@TookMe20min2findThis .Thanks , the questions you raise are better than the answers. "wave" i define as a bunch of particles. you have reached limit of my reasonable understanding (only a theory). Electromagnetic waves are polarized "e""waves" at 90 degrees to "h waves", what they are composed of in theory is 90 degree force fields. It works for television. i do not recall any particles involved.I once asked the all knowing what was "time". i got back a tall cone with a sphere on the side???

[TookMe20min2findThis]

@tyronejonez01

Thanks.

Well as you may have heard, "time" is simply another dimension along with space (x,y,z). However it is apparently a unidirectional dimension and like space it is not always (or ever?) the same for everyone.

Now back to my original question.. See, now your saying its force fields (so where those particles go?) That was my point.

I quite understand how EM waves "behave" (played with Max's equations), but I'm still puzzled. What are the E and H forces really are?!!!!

[TookMe20min2findThis]

@tyronejonez01

And BTW, I know where the electric forces and magnetic forces originate from, but how can their waves sustain themselves to infinity? Again are we living in a pool of forces?

I understand these are hard (if not impossible questions to answer) but if anyone can explain from a different perspective than using Maxwell's equations (which only describe the behavior, not the nature of the waves), you are more than welcome to explain.

Enjoy physics!

[tyronejonez01]

@TookMe20min2findThis I cannot answer directly, however the the reason i started this exchange of ideas was to find someone (like you ) to take apart my ideas in a logical manner. this is my theory: our conscientious is PARA_gravitational / time. which means we are only aware of 1/2 of the radiation cycle

of all atoms. Gravity radiates like magnetism in both polarities. we "see" exactly 1/2 of the universe. does this mean dark matter is? It explains the "quantum leap" quite well.

[tyronejonez01]

@tyronejonez01 I FORGOT TO MENTION AN IMPORTANT BIT OF HARD DATA! IN THE EARLY 1990'S DAVID HUDSON PRODUCED ANTI GRAVITY IN THE LAB. HE PATENTED THIS PROCESS AND TOLD THE PUBLIC HOW TO DO IT. THE WHOLE LECTURE WAS ABOUT 3 HRS. SO THE ANTI GRAVITY "FACT" IS NOT MY IDEA. OH WELL:)

[metalfan2112]

0:30 it looks like he's pushing himself down

[nachoseg]

i didnt quite understood xd

[ssa09003]

great man indeed

[ContainmentFailure]

Two people decided to crawl back under the rock under which they had emerged from.

[mehdiuk]

he answers questions as if he's been asked that question a millions time before, so structured, concise and intuitive. Not only an exceptional scientist, but also an extra-ordinary teacher, a very rare combination

[Rogueek]

@mehdiuk - i don't think he really taught as much as told everyone how it is. period.

[ccase2k]

@mehdiuk Very incredibly true.

[system0system0]

fuck the sound is to low can here on laptop

[ZolarV]

WHO THE HELL could EVER dislike this?????????????????? the person(s) that dislike this must be dumb, and need to be shot.

[system0system0]

@ZolarV They need to be rebooted

[stupidfleshmonkies]

Do the feynman lectures that are on the web use calculus or higher maths?

[MuonRay]

Operator and Functional Calculus(particularly Green's functions) , series solutions for particle scattering;Born series is the scaffolding for the Feynman diagrams(Green's functions become the propogators in this interpretation), Advanced Quantum mechanics; the Born approximation relates scattering cross-sections to Gaussian Potentials(which become the vertices in Feynman's diagrams)  and sum over histories for phasors- which are used in the optical theorem which relates particle cross-section..

[stupidfleshmonkies]

@MuonRay uhhh yea...thanks...well i have no idea what like any of that stuff is...but im going to assume i know enough math to learn this stuff...so im just gonna get to it...

[Rogueek]

@stupidfleshmonkies - physics is not math, it's physics.

[stupidfleshmonkies]

@Rogueek there extremely related though...you cant really learn physics without understanding math.

[Rogueek]

@stupidfleshmonkies - "there are 10 million million million million million million million million million particles in the universe, that we can observe. your momma took the ugly ones and put them into one nerd."

[stupidfleshmonkies]

@Rogueek Oh hell no...whats with your voice? I cant freakin tell, you sound like walle having sex with a speak and spell!" Ill school you anywhere, from MIT to Oxford, all your fans'll be like, umm that was Hawk-ward!"

[Rogueek]

@stupidfleshmonkies - excellent : )

[stupidfleshmonkies]

@Rogueek lol ive watched that like 7 times, its so amazing....

[MuonRay]

...to scattering amplitudes, for particles(more specifically to the imaginary part of the forward scattering aplitude)- imaginary because particles do not, in reality, travel backwards in time. Feynman is describing Relativistic Quantum mecanics, not ordinary Quantum mechanics.

[kayakbruce1]

@MuonRay i want my mommy

[krishtube]

Photons always have the same energy. Higher light intensity in a particular space {x1,y1,z1:x2,y2,z2} and a particular time { t } means higher EM wave amplitude which means higher probability of finding electrons in the space at that time

[k1llk1ngph30n1x]

. . . I still don't understand. This is hard. :P

[nfexp]

he knows hes wrong..."OK"

[03Kabbotta11]

I love how simplistic his writing on the board is. He seems to struggle to make sure every little dot on the board is important enough to place there.

[Invisiblefiyah]

he is neither a miracle nor a genius. he is an ordinary man with a keen interest and admiration for a particular field. any of you could be this man if you truly wanted to.

[datuna]

@Invisiblefiyah and if you worked hard enough))

[jakeZaks2012]

@Invisiblefiyah, you're partly right - he is not a "genius" in the sense of a miracle - likely all most humans need is a few "tweaks" here and there, and they could do what he did (little is known about what, biologically-speaking, determines - or, perhaps, limits - our individual intelligence levels, but it's likely nothing complicated). However, without those tweaks, we have no hope of being another Feynman.

To animals, we are all geniuses - if they could understand what we all do ;o)

[VERGIS92]

@Invisiblefiyah that is not really true, most successful physicists come from well off families, if you are poor while at university the first thing in your mind is getting a job to pay off your student loans. For the most of us, 90% of our thinking power has to go into making ends meet. Without a rich dad or a scholarship you are unlikley to become a nobel winner physicist, except in countries like Israel where bright students are paid.

[xXxReekoxXx]

one word can describe this man : Genius

[Bob8199]

Feynman had the brain power of 100 men.

[TamBellyDadMomom]

@Bob8199 Feynman had the passion for science of 100 men

[arcturian627]

Ahh, finally, a decent explanation for the layman! :D That just cleared up a lot of fog.

[Pugophile]

I see that someone didn't like this. Is he/she that all-too-common particle, the moron?

[geodesicks]

@Pugophile : I disliked it because he didn't really address the question. His method of arrows *does* describe a wave equation. The interpretation of what the wave represents -- probability instead of energy density -- is a different matter.

[Pugophile]

@geodesicks Please accept my apology. My comment was flippant in the extreme and, as it turns out, in poor taste. Thank you for doing me the honour of a reply.

[geodesicks]

@Pugophile : Fucking relax. Its YouTube. We get to cuss and call each other out like that.

[Pugophile]

@geodesicks Ah, that explains a lot.

[geodesicks]

@Pugophile : I'm the second person to dislike the video, btw. Some physicist before me may have seen through Feynman's explanation here.

[bIuebonics]

@geodesicks he actually did address the question. the question didn't ask whether or not the theory involved a wave equation, it asked whether or not it's a wave theory, as in a theory about a physical wave. "the wave" that you refer to can't represent anything because there is no wave; it is a particle whose location is probabilistically modeled by a wave function. there is certainly a distinction between what's being probabilistically modeled and the distribution used to model it.

[chongoonchua]

@Pugophile maybe they are... but dun flatter urself that u are smarter....

[SpecterReflector]

Very good explaination of the nature of the relativistic wave equation derived from Feynman's path integral formulation- most of the time we don't picture it as meaning anything, because we can express it as diagrams, however anybody who does these integrals always has, nagging at the back of their minds,the thought that they are dealing with a wave- which he clearly explains is not the case. it just shows that Feynaman, and Dirac before him, literally created a new branch of physics.

[jakeZaks2012]

@SpecterReflector, not really, I found out, this idea came from an earlier physicist, or physicists (I forget the details) - Feynman expanded on it.

[MrWajax]

Truly an inspirational man! Thumbs up & favorite.

[nickharvey7]

Wave-particle duality can be explained as a process forming the passage of time. Light could then be a wave as in Maxwell’s equations forming the future photon by photon or moment by moment. The energy or wavelength of the light will determine the rate that time runs in that reference frame. The probability is the same that the observer will have with any future event.

[Phranky]

Just keeping on nodding as if you know what he's talking about.

[broadcastmyass4u]

A grand historical figure, for sure!

[AppliedCryogenics]

look at that epic tie. 

[chrisofnottingham]

Too many physicists do popular science videos or books and confuse the armchair scientist by failing to make the distinction which RF is clarifying here.

They talk about particle/wave duality and say "sometimes it's a wave and sometimes it's a particle." This is wrong! QM is confusing enough as it is but this sort of talk makes it even harder to grasp.

I respect RD for saying an electron is always a particle but between observations it disappears and is replaced by a probability wavefunction.

[lds8714]

What a totally badass physicist Feynman was - original, elegant, but always practical.

[mohfoz77]

You should.....

Watch Richard Feynman on

Symphony of Science - 'We Are All Connected'

[mikeroephonics]

Are there Feynman lectures available on DVD or VHS? Thanks!

[kq6up]

Just google Feynman QED New Zealand. You can watch it on the web.

Chris

[mikeroephonics]

@kq6up I found the Vega site. Thanks!!! And BIG thanks for uploading these videos! I'm in the process of reading 'Surely, You're Joking.' Great read. :)

[CCTV9]

@mikeroephonics

There are books and audio books of his lecture from Caltech

[HeapsGoodGuy]

@mikeroephonics Google Project Tuva

[mugwamp4]

a great man

[flyfarmer2010]

shoo

[NRegals]

shoo? u have something to say or was that it?

[andina18]

where in New Zealand did this take place ?

[kq6up]

Auckland

[daikiryoku]

@andina18 lol

[keggs00]

It's not a physical wave, it's a mathematical probability.

[THEREALghostlaced]

Or more accurately, its a mathematical possibility.

[Grundalizer]

so the last 30 seconds, if it's not a wave function, then what is it

[Wcoltd]

something new.

[nickharvey7]

These are great videos

In my video The Paradox of Schrodingers Cat an artist view Time has symmetry and geometry that can explaining the paradoxes of wave particle duality in Quantum Physics

[fc007]

Where did you get this video lecture from

[al01ja15]

nice rare video!