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- เผยแพร่เมื่อ 4 ก.ค. 2024
- All parts of the lectures can be found in this playlist
• Quantum Mechanical Vie...
Richard Feynman explains Quantum Electrodynamics, the theory for which he got the Nobel Prize, 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
Alternative Title: Student Argues with Richard Feynman About His Theory That Wins Him The Nobel Prize.
What a sucker that interrupter is. Why his rubbish is permitted in this lecture
"Sit down and follow the arrow" Best quote ever!
If any of these students watched this later on they probably had a sudden realization they wasted some of the time they had with one of the most brilliant men ever to live trying to argue against something he was saying when they knew not even a fraction of what he did.
As a physicist, I can confirm that the audience member that keeps interrupting is clearly suffering from the Dunning-Kruger effect.
I now learned what the Dunning-Kruger effect is and also agree!
do you know Feynman encourage student asking question and challenging professor
oldcowbb I really love that aspect of his character. He makes you ask the right questions too.
We need more people like you Sean! Proud to share space time with you :)
oldcowbb yes but when he says « this is not what I am lecturing about » it’s time to shift the f# up
If there has ever been anyone throughout human history who could explain extremely complicated things to people with little or no knowledge about what is being taught as well as Richard Feynman I haven't come across them yet. I have a B.A degree and because of that I've had many teachers in my life. I realize that teachers exist outside of a school curriculum.
Without fail, at least in my case, the few teachers I've been exposed to while in school who gave lectures barefooted were at least as good as the best teachers I came across. Richard is the only male teacher I've even seen give lectures in bare feet however. All the rest were female teachers and in total there were 2 of them.
Occasionally I re-watch a Feynman lecture when in the mood and I always pick things up that I missed in previous viewings. And always realizing that there are many things I'll never understand no matter how many times I view them. Cheers
Feynman was incredibly patient with that besserwisser at the 20-minute mark. That's a god-level of tolerance.
You should be theankfull to the annoyng guy asking questions, cause thanks to him Feynman gives a delicious and clearer and wider explanation of how a therory might be more complete than a previous one by adding explanaition to a newer mistery. It¨s away from the main lecture, but his philosofy od science is soooo remarkable. What a mind !!! In a way he was born condemned to be questioning everything all the time with no rest of mind (He drops his mic and he can¨t help in silence for a second to try to find out exactly why it happened)
Why did he drop the mic?
@@DrChrisB he stepped on the wire. They weren't using wireless back then
This dude's lucky enough to have one of the greatest scientists of all time giving him personal instruction in the subject that made him famous and he won't stop interrupting
I know nothing about physics but this is fascinating to me!. What a cool guy. If I had a guy like him in HS I would have fallen in love with this stuff.
THERE IS NO 2 PHOTONS!
I was scared at that point
I love pretending to almost understand exactly what Richard is saying.... he looked like the most amazingly advanced teacher! I'd have really enjoyed his lessons
...
..
"You helped invented the Atom Bomb? I bet I can challenge you on your physics and prove I'm a student..."
Yup!! As an optics student, the student’s exchange with Feynman was incredibly cringy. He was saying things like refraction (on a perpendicular ray!) he appeared oblivious that light is slower in glass (then goes on a rant about boats!?) yikes
The geocentric Ptolemaic model of our solar system works perfectly for predicting and explaining the motion of the planets, the moon, and the sun. It even worked better than Copernicus’ model. Was Ptolemy correct? No! It will not hold up over the whole array of phenomena that we want to observe!
Smh
I love that I can follow this with only g12 math and physics. So uncomplicated. So brilliant.
The universe is, in a literal sense, a "quantum computer" 😅
@@r_bear Yes, but what it computes is the program called "Classical Physics Simulator".
The patience of this man in taking time to explain why a little knowledge or a classical interpretation is a dangerous thing (doesn't work in all cases) for quantum reality.
Save all your questions till the end.
Interesting and revealing lectures... what year these were given (tried to search but couldn't find the answer)?
I would enjoy this a lot more if these pinheads would quit trying to complicate things with their trying to impose what they think they know.
I have so many questions I wish Professor Feynman is still around ... but I think he'd just get annoyed with my simple questions xD
Enlightening
Stop asking questions and watch the damn lecture
RomulessI Well said. It takes a special kind of cajones to argue (badly) with Feynman on the matter of quantum mechanics.
djordjekojicic the fucker is polluting the information being passed down to our generations on youtube. I can't learn about this shit any where else, I couldn't grasp this shit via literature. I can barely finish a mr men. The modern ability to spoon feed information to lazy people is a god damn miracle and this guy keeps taking my spoon shoving it up his ass for a minute then putting it back in my mouth. literally sick of that guys shit.
I knewvFineman. Smart cookie. Figured out why the Chlenger crashed. Frozen O rings. Lol I loved his way of thinking. Baker
i actually love to read the comments while listening, and i am wondering if this guy who is always nagging if he is still alive.. what would he think of himself? is he famous by reading all these bad comments about him :) .. i would be lucky to be in his place sitting watching Feynman lecturing and he is just wasting this chance by pretending he is smart and nagging all the time and wasting the class's time..
Around 41:50 , how do the unequal angle photons get to the detector? If a photon hits the mirror at 70 degrees, why doesn't it bounce off the mirror at 70 degrees ? How does it bounce off at 60 or 80 degrees ?
Probability. You have to accept it even though you can't say why.
I would've given almost anything to be in this audience.
yep...me too:)
You are.
even your shoes?
@@TheKturner05 especially my shoes! You want my worn out Sketchers!? Take them!
The guy with all the questions is NOT LISTENING. He undoubtedly went on to become the boss from hell.
That guy in the audience who keeps interupting needs a fookin' good kicking ! Totally ruined the lecture FB!
My favorite words when he say lumber
Learn to move lumber ha ha !
Hah! He's barefoot. He's my absolute hero.
Haha the commentsection is gold
Brilliant man they never taught me about in school
Even long after I have left school people who ask too many questions during a lecture still annoy the hell out of me.
when adding arrows this way, the resulting arrow ignores the time difference between how long it takes to make each step in sequence versus making the resulting step on it´s own. Does this matter? or all the arrows happen simultaneously, in which case it wouldn´t?
These arrows you're adding represent the multiplicity of paths the probability wave takes during the process. They all happen at the same time. Even though "one photon" leaves the source and arrives at the detector, the probability wave associated with it is all spread out. You "imagine" that the photon takes all possible paths, and you add up arrows based on those paths.
@@KipIngram In other words, there is a probability that the photon will be travelling for longer?
@@TheKturner05 Well, it's not just one photon. You get a new photon with each emission event, and that photon vanishes with each absorption event. And the cumulative time all of those photons travel is exactly equal to the total distance they travel divided by c. However, the time spent in between absorption and emission is variable (but greater than zero), and also the direction of each emission is random, so taken all together those photons travel in a "zig zag" path through the medium. For both of these latter reasons the total time will be greater than the straight line distance between the start and end points divided by c.
@@KipIngram I do appreciate you trying to answer my question but I believe I asked a simple question and I found your response very confusing.
I'm very sorry. So let me try again. If you start with a photon on side A of a material layer, you can start following that photon. It flies into the material, and is quickly absorbed by some atom. Shortly thereafter, that atom emits a replacement photon, in a random direction. It travels a little way, and gets absorbed again. This process repeats over and over, with photons flying short distances within the material. Sometimes this eventually leads to a photon leaving the far side of the material, and you can regard a photon as having traveled from your original starting point to this end poing we've identified on the other side of the material. During that process photons were flying through space some of the time, always at c, and some of the time we were in between absorption and emission events.
You can certainly take the time you detect a photon leaving side B of the material, subtract the time it entered side A of the material, and work out an average speed. That speed will be lower than c. But the point I'm trying to stress is that at any instantaneous moment that you check a photon's speed, it will be c. It's only the average speed that's below c, as a result of the random directions and the time lost in "absorption pit stops."
Anyway, I hope that helps. If not I really am sorry - I certainly wanted to help. But I also wanted to describe what's really happening and not "corner cut" it.
Stay safe an well, man.
I find it interesting how the member of the audience who keeps asking stuff is despised in alot of the comments since asking is a really good source of learning and learning is what we all kind of try to do here or am i wrong?
Yes. You are. There's a time and place for each reflection. Those who turn around in loops are useless to the experience as Mr Feynman could have shown in a much shorter time if the student wasn't so thick.
The student knows the details. He is there probably to test the patience of Mr Feymann
The issue is he's not asking questions in order to learn, he's essentially interupting again and again to assert that classical physics is right because from his limited experimential experience the wave model can be used to give expected results, and from his limited experience he thinks he knows better and that the teacher is wrong. Anyone who acts like that should be rightly despised.
Whenever he has colored markers things get bananas.
Good
The guy arguing him sbout 20-yj minute is really by far out of the scope of tolerrance/ He basically says: I really know what parts of knowledge are worth attention of this crows, why do you dare to ignore it? Hard to realize individials like that one are so blindly confident and their moth takes so much of our time.
There is always one of these guys/girls that think they know something, which prevents them from knowing anything. Feynman should great patience and tolerance in dealing with this barrier to intelligence.
@@billmccaffrey1977 years passed since I wrote this comment. Things have changed quite a bit. Feynman is one of those great human beings I admire so much. Part of human history. Bigger than Physics for me.
How in nature's name do photons calculate vectors on mirrors every single time you look at a mirror? Wild and amusing.
I think the brain is doing the calculating. (I think)
is the arrow rule was created by Feynman himself?
you'er thinking of feynman diagrams.
The arrows allow Feynman to dispense with the mathematics. It’s pretty clever. The rotating arrows represent frequencies (rotation rate) and phase (angle).
Ow my brain
He seems to take way too long to explain the process of adding arrows and I don't know why he makes them so small on the board. I've noticed that before in his lectures, he finds a brilliant intuitive way to show some complex idea and then gets derailed by over explaining the simple thing!
chris4072511 because of the bloody moron who keep asking irrelevant questions
That man is so fine!
"Folow the arrow"
Pothegariad has changed. Color
Yep. I got it! Time to travel in time or something. @_@; :D
man if they had this when I was a kid...u'd prob be watching me instead ...a legend & a genius ...superb content....a historical gem...thE cats meow...exactly what the net is(should be) 4....only 8k ppl interested ....yet piano kitty gets 10M views....whats wrong with ppl of this world?...it all started when muscle magazine started outselling omni....free mind candy 4 the masses ...1 way 2 help fix the future 4 sure
OMG, that FUCKING audience... Who are those people? How did they end up in the same room as Feynman, and why are they talking? Clearly, several of them are not qualified to understand (in a philosophical way) what this man is even trying to do, so why exactly are they there?
search 'Feynman QED diagrams in crop circles'
... grating. The back of a CD and reflective stripes on police cars are some examples.
I did not understand a thing
he should not talk him out of his model.
10:45 WTF?!
Jesus, I can't start to describe how annoyed I would have become at this bunch of kindergarten level baboons! His explanations were as clear as can be, and they kept interrupting about totally unrelated things... Kudos to Mr. Feynman for not losing it...
Beside learning something about the quantum mechanics, teachers should learn the art of teaching and dealing with questions
And barefoot.
Speaking as a time served Bricklayer who sprays intumescent paint, why is someone challenging his knowledge, and clearly not listening to what he's saying??
Also , what boxes???
Not A Real Ninja bricklayers are artists.
I’m happy you realized you had to delete that other comment. Shows your intelligence.
Amere Mortal
Sometimes a person learns in the comments aswel as than video...
I never went to university, i was on a building site at 17..
v - t - e
“”I am wiser than this man, for neither of us appears to know anything great and good; but he fancies he knows something, although he knows nothing; whereas I, as I do not know anything, so I do not fancy I do. In this trifling particular, then, I appear to be wiser than he, because I do not fancy I know what I do not know.
Amere Mortal what are the boxes he refers to?
@@staffyforme I think the boxes are meant to detect the photons. You can watch his explanation in Part 1. I'm not a physicist, but an engineer so I'm as confused ahahahaha
If Richard Feynman were alive today, he would take you to task for titling ...how many?... videos such that the only distinguishing parts of the titles are the parts that get truncated in the listings. It's impossible to tell them apart, or even find out how many of them there are, without opening them first. Doing things in a smart way shouldn't be confined to thinking about quantum mechanics.
The real question for me is: why is Feynman shoeless and with naked feet
Why not? I have seen quite a few barefoot folks in academia. One of my math TAs went without shoes summer and winter, even in snow and ice. I asked him about it and he said that one gets used to it very quickly. Once the callus builds up, human feet are remarkably tolerant to the environment.
Removing logo would help. The person who is asking questions has failed to understand the basic concept that Prof., was trying to teach..he wnat to discuss philosophy.... this student is in the wrong class, hope he did or does not work in the nuclear industy ! The student should have got the hint and needs to stop "worrying" ha ha. He has a lack of cognitive ability, he cant see it is Quanta not Wave-Theory. The other students should had had a word and tell him to just listen, write his questions and then read read read until he gets it. Amazing how he can explain things that are obviously more complex than most physicts will ever understand in a life time :). And yes I have a high IQ , what ever that means.
One or a couple of these audience members are the most unspeakably rude people I've ever seen.
Science is the belief in the ignorance of the experts. So you gotta appreciate the balls on the guy asking. At least the humiliation probably drove him to find the correct understanding.
2 Clicks lmao good point
The guy simply didn’t know his stuff and it was annoying for him to keep on bluffing
what does a troll do? try to rain on parades? Ive seen that word a lot for the last few years but never knew what it meant, could someone please use the arrows to explain? I only use arrows to comm these days since ppls accents take away from the precision of verbal linguistics, arrows are the same no matter who says them..
^^^ ->
while this series was happening in big sur ca there were diagrams of the chromosphere being depicted in 2D layers onto the cereal fields of southern england.. Crop Circles answered the question at 21:30 about 3hrs real time before the question was actually asked.. weird stuff, something like feynmans brain may be responsible for what we call ET.. or they were answering from the 5th dimension.
He’s barefoot.
Boy he was sure getting frustrated with that narcissist who kept asking so many questions when Richard was trying to teach the basics of probability. He kept telling him that is not what this talk is about. And the guy kept going on and on and on.
dunno about betty and barney hill, dunno about stan romanek, aint sure about where travis walton went for 5days+6hrs, but something definitely is happening and its not confined to our version of reality.. The answer = BOINK!! I DUNNO- im stuck on a brane wanna gimme a fukin hand here or what?!
Bradley Willis I have no idea what you said hahaha