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- เผยแพร่เมื่อ 13 ก.พ. 2013
- All parts of the lectures can be found in this playlist
• Quantum Mechanical Vie...
Richard Feynman explains the theory for which he got the Nobel Prize, Quantum Electrodynamics, in a workshop at Esalen.
I DO NOT OWN THIS MATERIAL. IF IT VIOLATES COPYRIGHT OR SOMETHING LIKE THAT, I WILL REMOVE IT IF I AM NOTIFIED OF SUCH A VIOLATION. - วิทยาศาสตร์และเทคโนโลยี
I feel so privileged to be listening to one of his lectures. A great physicist and great teacher.
He really tries to answer the questions that the audience (class) asks!
thank you for being so anti-politically correct.
His expertise and to-the-point conclusions about the explosion of the space shuttle Challenger were an epiphany. I remember him as a 'simple genius'; since he was able to clarify the most complex events and processes with common words and make anybody understand what he was talking about. RIP Richard Feynman, you are dearly missed.
Rest in Peace Mr Feymann
thank you for these. people like you are what makes the internet worthwhile.
The most interesting human being that has ever lived. I can watch Feynman for the remainder of my life and I'll be happy.
I've decided I may as well be married to him. I'm exactly the same, he literally makes me high, sometimes it's almost too much, it's like I'm too small to contain the emotion, nevermind the intellect.
Bettie Stiletto Make your own way. Feynman wouldn’t want followers, he’d want individuals.
@THE CORRECT THEORY OF EVERYTHING I'm gonna read this, try my best to ascertain the relative truth/falsehood of it, and message you about it, okay? Upon scanning the paper you linked, I noticed that it's written with poor grammar, which isn't a good sign. However, I'll give it a chance. I'll either comment here or contact you more directly (if you want to provide a throwaway email at which I can reach you).
Edit: Well, you're either a troll or fully psychotic -- I'm not sure which. Best of luck matey. Take care of yourself
Pick one person from each century for a pool party.
@@nmarbletoe8210 I'd definitely want Eiinstein and Feynman there. Then I'd have to go with Shakespeare, Davinci and The Beatles lol.
I love the parallel between making copies of the box with the left button specified and the way the photomultiplier brings the observation into the macroscopic world so we can make an observation.
oh.. to be a fly on the board of a Feynman talk.. ty for posting this. So very much.
when i first started this video i scrolled through the comments and saw this one-- i thought you were just saying a variation of the "fly on the wall" saying but NO there are flies on the whiteboard!!!! that's amazing haha! i too would have loved to be one of those flies
Richard Feynman once wrote: "There is no harm in doubt and scepticism, for it is through these that new discoveries are made." Anywhere there is denial of freedom to speak or write on any topic is harmful and a rejection of Feynman's philosophy.
What about NAMBLA?
Why do you ask?
the answers we get are rarely the ones we want but they are still the answers. the question is wether you get it or not. Feynman is one smart cookie.
If it we're possible to have 10mins with anyone, past or present, mine would be Richard Fyneman.
This is awesome. pretty good quality for being so old.
What can I say. Am 40 now, leared alot true my life, and this make 100% sense now :)
A true teacher. Quantum woo presented to its basic principles.
@ 7:19 Feynman performed the Feynman Mind Trick...or was it the Feynman Mind Meld? Why is it that I always feel wiser than I am and happier after listening to Richard?
Happy, Happy! (;
This is more or less the start of his book _Quantum ElectroDynamics_ (QED)
Very similar, but the book with the extra illustrations is easier to follow.
@Jesus Reincarnated Sean Gilligan AKA John Connors what?
@Jesus Reincarnated Sean Gilligan AKA John Connors I don't understand what that link is, did you make a theory about everything, is that right?
@Jesus Reincarnated Sean Gilligan AKA John Connors I'm only 12, I read really fast but I didn't understand it very well due to my age. I will read it again thought.
@Jesus Reincarnated Sean Gilligan AKA John Connors Yes, I love dogs
@Jesus Reincarnated Sean Gilligan AKA John Connors thank you for the recommendations :)
A Click is a Loud Noise. What a wonderful man
Thanks for posting.
Until you detect the position of a particle it is not correct to say that it either there or it is not there. That is a classical description. you can say that there is a probability that you would find it there if you were to perform a specific measurement but not that it in fact either there or not before the measurement.
Like the diagram on the pulses of reflection As light passes through a thicker and thicker layer of glass More like a swimmer that repeats a set of coordinate movements in a style Than like a nail being driven in to wood That has to be hit harder and harder the deeper it goes
Richard Feynman. The Greatest :)
Never seen this, thanks.
Finally, a scientist who talks about limits of scientific knowledge about reality rather than some Chopra-esque interpretation. We see scientists making pronouncements in the public square that play on people's ignorance, but are universally panned by colleagues. Thx for these videos.
+Fermium ever heard of Max Tegmark? What about Larry Krauss? Universe from Nothing where Krauss equivocated on the term "nothing," to mean, "Something," ever watched a Carl Sagan episode of The Cosmos? What about Neil deGrasse Tyson? Michio Kaku? Richard Dawkins, Peter Atkins?
These guys are taking a page from the Young Earth crowd, and are trying to press science into service of a worldview (except for Tegmark). Even Feynman's views on philosophy of science would weaken over time.
My point... Let science be science.
Thanks
Thanks
Thanks g
Quit
i hope, Feynman got money for these lectures. He was explaining and was answering questions that one can find in every standard textbook.
Yes, but there a very few textbooks, if any, that answer these questions so beautifully as Feynman does.
I'd like to see the difference between different color of light hitting a photomultiplier tube which is not there in a banana leaf exposed to sunlight and viewed through the Polariser to be untouched by the duality conundrum, since the striations of red, orange and blue bands are trichomatic.
There was a movie planned about Feynman that was going to star Robin Williams as Feynman. Of course, it never came to fruition because Williams left us too early.
The challenger is a good one. Rogers commision
Fuck that's heartbreaking
When I presented my thesis work on molecular Quantum Mechanics in front of jury to try integrate CNRS (France), to the bad question "what have you done" I answered "just calculus" So being excluded. If Richard Feynman had been there, maybe he will say ok.
Time to learn more :D
I wish I could ask him questions... he was such a generous educator
Mathematics(Statistics)is the mother of science.But without fertile intuition based on physics or science,science cannot grow.We are stuck-up.
Yes and That's why who can understand the language of Nature can give us postulates and based on this we make our own world with wonders of Nature. The clever arrangements of all these stuffs require creative knowledge which is called as Science and application of it gives technology. So moral is, Feel the Mother Nature and make the mind as receiver! Undoubtedly Tesla did so...
Feynman is the greatest scientists of the 20th century
Literally a genius. I nicknamed him the Tower, because intellectual he towered about almost any other physicist. I liked his modesty too. He was held up as an example by one of the great lecturers I studied under at Manchester in the 1990s.
You clearly didn't read the papers of Schwinger, then. ;-)
This is gold!
Very humble man did not try to snow me with all the mathematics.
A very smart man indeed. too bad we lost him ?
manaohar samtani not super humble, he knew he was awesome. And he was
@@dougg1075 .
That has nothing to do with humility. This lecture is at an elementary conceptual level. Do you think all of his lectures lacked mathematics?
@@stepaushi No a lot of his lectures had mathematics. But looks like he did a good job of explaining when he wrote all the math. This means physical meaning of all the math. If any one writes all the math and dont explain it takes only a few learned ones to understand it. So how can we expect an Engineer like me to comprehend every detail in Quantum Electrodynamics as an example.
@@manaoharsam4211 I totally agree with you.
It's not so hard to explain from a Lorentzian point of view. The photon is a wave that approaches both detectors, and the squared amplitude of the transmitted part of the wave (in the water) is 25 times greater than that of the reflected part (in the air). Depending on Planck-level details of the vacuum that we can't currently detect, one or the other of the detectors absorbs one photon's worth of energy, and a wave that cancels the original photon travels from the triggered detector to the other one at an extremely high speed (at least 10000*c). This is allowed in Lorentzian physics.
I hope this qm got more application to follow up what they did.
Their research must have got into great new paths...
Someone could think this is pure mathematics, not physics..?
The equations looks very complicated. Why can it not be explained in any other way?
The quantum computer was maybe only at idea level at his time. But that should be something to follow up also.
Is it possible to take the time it take for a photon to travel from emitting to detector and then find out where the photon was reflected if you have a distance more than a meter between the surfaces ?
+GameReality :::What i find most interesting is how the scientists use the example backwards. They usually start by saying " if you shine a light on a particle, you have caused a change to it's position and you can't see it's position or momentum. To me, it makes more sense to say, " if you shine a light on a particle, to see where the particle is, by the time the the probe is used to see the particle, has already moved, because there is a "delay" from the probing particle due to the speed of light. So, you can never know exactly where a particle is, because the probe you use had a time limit built into it. Therefore it had to bounce off the particle you are trying to see and then go into the lense of your microscope so you can see it. That short time delay means that the particle is now somewhere else at the speed of light.
7:33 - "If you're spitting spitting bullets at random, maybe, by accident, two come out."
Man, I wish I could spit bullets like Feynman.
Lewis Jones right?
No entiendo el inglés pero creo que tiene sentido del humor. Me gusta.
The fly on the whiteboard was getting an excellent education. :o)
It is really sad some went with the argument that reality does not exist.So quantum mechanics becomes popular.Democracy in science!
9:10
Every undergrad physics dream shattered.
7:19 seconds there´s a CUT in the footage!!!!....
WHY!?!?
I believe that section was actually deleted. Nobody will ever know what Feynman knows about Photomultipliers and their progeny.
“The Sacred Texts!”
Partial reflection, as applied in a sociological perspective. Perhaps something impossible sounding, like peace, is possible with an understanding of the nature of partial reflection.
When was this filmed?
What if you jiggled the glass 20:56 to match the frequency of the monochromatic light (so the photons hit the same spot) and record a interference pattern with the bounced and initial beam as you do in holographics ? Do we actually know by now what literally happens at the point of impact of the photon ? The interaction with electrons and so on..
light is around 10^15 Hz...you can't jiggle anything that fast. Ultrasound tops out in the megahertz....the atomic spacing divided by the speed of sound.
I love that the audience is sitting cross legged in a semi circle around him.
Is there a clear boundary of scale where quantum effects begin? Or is it a blurry boundary where it sort of segues?
As far as I understand it, quantum effects act at all scales. It just becomes noticable at smaller scales.
@@sangramjitchakraborty7845 That's wonderful. Thank you.
One threshold is when the deBroglie wavelength of particles grow big enough to overlap. This can happen as atoms in a gas are cooled, and it causes a Bose Einstein Condensate.
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Researchers also made a quantum superposition "diving board" thing that is just visible to the human eye.
.
Thanks
The Esalen Institute in Big Sur, Calif.
He probably couldn't wait to get away from that place.
I'm not too particular about particles; waves are friendlier because they wave at you and you can wave back.
What a privilege... I know a little wee bit... most is way over my head.... but a sit in awe... like a child..... how is that organisms... primates of this planet have evolved such minds to study and begin to understand our universe... humbling eh👍🌹
these are awesome... I've watched shitloads of feynman but this helped something click.
Where Does the momentum come from to force the protons to go the speed of light. And why does it not run out of energy
steven holmes It’s photons
Photons always go at the speed of light. It’s their nature.
Photons are light so they travel at the speed of light
@@antoniovaldez9515 Watch "Quantum Mechanics" on...
th-cam.com/video/UymZR_N4GIM/w-d-xo.html
Photons are massless at rest. So they have no momentum and need no energy to travel at light speed.
1:15 what was the question that everybody laughed at Richard's answer?
I think she asked what is unreal nature?
She asked, " What's unreal ? "
Feynman : nothing, it's just a mistaken phrase !
Does anyone know what the joke was at the beginning around 1:17?
Feynman: Ordinary ideas will not work...to handle what happens in real nature
Student (Interrupting): What does real mean? What does unreal mean?
Feynman: Nothing. It's a mistaken phrase.
Feynman is my role model as a teacher. But why are there so many bugs crawling on the white board?
love you feynmen
how science has shifted-theories that seemed pretty advanced back then are just regular bachelor knowledge right now
I would've loved to have been there, when he talked about different colors of light hitting the photomultiplier plate, to bring up that when you're talking about spectral colors, having different energies, you're talking about longer or shorter *wave* lengths-and we're back to the duality conundrum again.
So how many other people are watching these just to have some better noise in their own heads? *raises hand*
He reminds me of Peter Falk doing Columbo.
I wish I had hope but I truly dont
Reality is quantized. Does that mean that reality is a simulation, and these energy levels are our pixels?
If this reality is a simulation, would the top, "real" reality be quantized too?
The odd (they say) are greatly in favor of us being in a simulation.
Reality is quantized, but each quantum acts as if it were part of a wave, which is not quantized but spread out.
@@GeeTrieste okay I think I comprehend the concept though the math of it for me is still mysterious. Sadly I would have to pay extra money if I wanted to take a quantum physics course.
Where is that wave spread out and what's the relation between the quanta? Is it spread out through space? If so that would mean that two quanta can be infinitely close together and to me that seems the same as being in the same place, would that violate some law?
Sorry for the many many questions
Yeah I think it's better to just search for a free course
@@norielsylvire4097 Yeah lotta questions :-)
>Where is that wave spread out ?
The waves are spread out through space if unconfined; if they are contained in a constrained space, like a box or trap, then they form a dimensional pattern (standing wave) within that space.
>what's the relation between the quanta?
These are 3D spatially extent waves, probability waves, whose intensity is a scalar measure of the probability of the particle's presence at a given point, when the particle is observed the probability is 100% at that position. Until the particle is observed though its potential for being at some point is measured via the wave's intensity at that point in space.
>If so that would mean that two quanta can be infinitely close together and to me that seems the same as being in the same place, would that violate some law?
Two particles cannot be infinitely close for a few reasons. The first is that to be specifically anywhere is prohibited by the Heisenberg Uncertainty Principle. Second for 1/2*n spin particles the Pauli Exclusion Principle prevents any two particles from having the same quantum state in the same place -- basically the probability waves superpose to cancel out their amplitude, and probability being zero means the two particles just would not exist at those points.
@@GeeTrieste that's awesome but I still have one question: that means there are lots of waves, not just one "Universe" wave, right?
If there was a single wave that would mean there exist a way to represent the probability that one single particle is somewhere
I think I heard you can add waves together but that just doesn't make sense to me
I think I should stop bothering you, sorry
This man is incredible and its one of the biggest losses of our generation.
I'd imagine the only thing he really cared about was that he allowed others to pursue science and further the field past his lifetime.
what level of student or listener was this lecture intended for? Is he talking to lay people or to students?
People who are easily impressed.
quantum mechanics is to create relationship to the creator untill u c Hell clearly and also not impossible to feel haven before u die
that's the spirit quark vs hatchium physics
what the hell does this even mean????
@@chaplinmarchais2131 it means schizophrenia is a heck of a thing.
This is some insight too deep for sane people to understand
If I were you I`d quit the drugs!
Sound photosynthesis? How about “phonosynthesis”
nolan will be watching this video fr his nxt sci fi flick
Haha😂, true mate.
22:22 I think the refection or passing through of photons depend on how they interact with atoms molecules of glass surface. Not probabilistic. Like hidden variables.
Unfortunately for people like me, I didn't have teacher like Mr Feynman though Physics is most intriguing subject inn my life. Really bad luck in this life
we miss you richard....you could drive a priest to science...probably have good sir
As for a priest....sorry but Father George's LeMaitre was already having dinner with A Einstein pointing out his error. Now go pray for forgiveness.
Sound impossible to hear.
Heheh. I love how frustrated he gets with that guy.
I like your picture
"Mathematics has the completely false reputation of yielding infallible conclusions. Its infallibility is nothing but identity. Two times two is not four, but it is just two times two, and that is what we call four for short. But four is nothing new at all. And thus it goes on and on in its conclusions, except that in the higher formulas the identity fades out of sight." (Johann Wolfgang Von Goethe)
Thanks, very interesting quote, especially "But four is nothing new at all." Essentially everything ends with our resolution of understanding!
Cheers 😽
. idenin
multiplication for Except infallible identities untrue are 1729 and 1728
If we was running our stealth program we would now have invisible warships.
Where was this lecture given? The restroom? That room has a fly problem.
I see not know or understand. Urgency overwhelms.
foist we see if it woiks!
Thank-you.Me too. (;
A guy of Feynman's stature is lecturing and no one could put up a Shell No Pest Strip?
roughly speaking
Light.. Morse code
Edited Feynman' s lectures on physics are meant for mature professionals. Only Feynman dared to explain in plain English the most difficult issues in physics. From that perspective he is one and only teacher of all teachers.
Why do you care what other people think?
🌷🕊️✋📯
I just typed aus witz into google translate...
Damn shitflies on professor Feynman's whiteboard!
Just wanted to make the comments 120
Who is the audience?
Damn cute and smart❤❤
hooiu
"if I can use that HORRIFYING language, I don't really mean that" XD 19:54
Hevery look a liks chalie sheen
.
8:19 TFW you forgot to do up your zipper.
Its the mic
What are you talking about??
:D
We'll be hard pressed to find a more intelligent man....
last ones were a bunch of hippies on bean bags.
Particles don´t exist, only a set of properties based in angular momentum of the quantised cells of the space-time grid. Those properties (particles), are spread in different proportions on the grid, and when we measure them we force them to concentrate back into a single cell of the grid by cancelling the momentum of the cells that carried less proportion of the total energy or momentum that caused those set of properties we called a particle.
the fuck
Nice idea, get back to us when you've quantized spacetime ;)
ne vedome vo spánku som spadol do čierne diery kde som vyšiel na mali piesok kde som bol ten sami mali chlapec 🧒 pred domnou som videl oceán a v nich malé rybky z ktorých sa ozval hlas po oceáne môžeš chodiť ale nikdy do neho ne spadneš s od povedou že to není taky oceán ktorý je na zemi