Paul A. M. Dirac, Interview by Friedrich Hund (1982)
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- čas přidán 16. 02. 2023
- Interview with Paul Adrien Maurice Dirac (1902-1984), Nobel Prize in Physics 1933, "for the discovery of new productive forms of atomic theory". Topics discussed:
Symmetry as central concept in theoretical physics.
Space and time according to Lorentz.
Matter and anti-matter.
Dirac's definition of symmetry.
Fermions, Negative energy levels.
Einstein's general theory of relativity.
Natural times and lengths.
Cosmology and gravitation.
Relativistic quantum mechanics.
Atomic constants. - Věda a technologie
This is why I love CZcams. Thank you for posting this!
Someone I had regarded as strictly a historical figure has been presented to me as an actual person! Thank you mehranshargh, thank you CZcams!
same... Having read the strangest man, I actually didn't realise this even existed, brought the man to life
It has happened because of you what you trying to mean in a little hiding manner what you really want to say.
@@SumanBiswas-vj3cb Well I guess you told me.........something.
Thanks for your comment, pretty much my thoughts also!
I never thought he had a video of himself i’m amazed, he was younger than einstein right…
Paul Dirac was the strangest man according to Bohr, yet during his time he was the man closest to truth in physics. A true genius !
In what way. Did Bohr explain why ?
@birdman4274
This is conjecture on my and many others part, so take this as you will, but as someone with ASD it appears clear to me that Dirac had a form of Autism or other such disorder. The way his mannerisms, behavior, thought, speech, everything he did and how he went about it tells me his 'eccentric' nature came down to not only how he saw the world, but interacted with it as well.
I have no proof of these claims (Dirac himself I believe was never tested, nor gave any personal account therein), but from an outside perspective with firsthand insight into the nature of ASD I would confidently say Dirac was on the spectrum, as I've found similar occurrences in other major mathematical minds.
Perhaps I am well off base and he was simply an intelligent man who could not connect with people due to his personal understanding of human nature and the world at large, but to me that is a moot point considering his other behaviors (reclusivity, very little speech unless he "had something meaningful to say", particular routines (I believe he had even scheduled his walking/thinking time and stuck to it religiously), et cetera).
I simply believe these factors are the cause for many people viewing Dirac as strange, eccentric, weird, and above all intelligent. He had such a beautiful mind and the world is left not only better due to his legacy, but also worse because there has not been another great mind like his in decades.
RIP P.A.M. Dirac
@@birdman4274He was very much a private person, introverted and barely talked.
@@carl7664 His colleagues in Cambridge jokingly defined a unit called a "dirac", which was one word per hour.
There might be a correlation aha
Dirac is very charming to me...never interrupts others and miminal when he himself speaks.
People don’t like that. They like loud clowns
@@Bluefalconspiracies Ye, f dirac, why utube suggest this video to me, he sounds like dementia boy
Such a marvellous sight of conversation. I can't believe how bright and sharp Dirac is at this age answering every question that Friedrich posed very eloquently.
Good Morning:
Is that Norbert Dragon speaking?
It's because only Norbert Dragon of Karlsruhe & Hannover, John Singh from Ireland and maybe Jürgen Ehlers are the Ray Experts here!
Are you Dr. Tarek Azzam ?
legends
And instantly without delay or hesitation
Friedrich Hund was 6 years older than Dirac and outlived him (he died aged 101)
Two incredible scientists Mr Dirac is 80 in this video and Mr Hund 86 years old! They were beautiful persons! Mr Hund died in Göttingen at 101
It really is amazing that humanity got to experience the minds of Einstein and Dirac so closely together.
Indeed As well as Schrodinger
Fascinating conversation and an utter joy to listen along. Dirac was the humblest of scientists and brilliant in so many ways.
Dirac seems like a calm and gentle person.
Only bc of age
he had little choice, he was old and had health problems
@@greymonwar9906 He was always like that, just read his story, the act of talking was a lifetime trauma to him, because his father would spank him every time he missed a word gender or verbal time (his language is French). When his brother commited S, he said "i didnt understood why my parents were so sad at the moment, but later on i understood that this is a normal thing" because he literally never understood the concept of love. His friends created a meme constant called "dirac constant" that represent 1word/hour.
@beniocabeleleiraleila5799 I came to the comment section just to see if someone mentioned the 1 word per hour dirac unit.
Dirac was also married to Wiegner's sister.
Best comment on any vid on YT
I read about quantum physics, trying to understand the concepts, but I'm not educated enough to be able to understand the mathematics. Hearing Dirac put his knowledge into words is quite amazing and interesting for me. I never expected he'd agree to be interviewed and filmed!
Such a lovely and profound interview! Two great minds discussing the nature of the universe and life. The humility in conversation, where both men are so aware of what they don't know! So RARE to see in this age of social media where opinion is presented as fact!
Unlike what today's "thinkers" seem inclined to believe this video shows that real great thinkers didn't need to speak fast in order to prove their points
Dirac was famously taciturn. His colleagues at Cambridge coined a new unit "the Dirac" as the minimum needed to partake in a conversation, a "Dirac" was one word per hour.
The people who built our world , The people who uplifted our conscience ,the people who made us evolve ❤
Dirac, this shy genius, perhaps spoke a lot more during this interview than he had spoken during his whole previous life. With his silence and dedication he made humans a better species.His work and contributions to quantum physics will be taught for several thousand years from now.
Well said !
Much like how children at school now learn the Pythagorean theorem. Thousands of years after its discovery 🤭
He went to the same high school as Nobel Prize winner Peter Higgs
Amazing interview. Hund was older than Dirac!
Hund reminds me of a Thunderbírds puppet.
@@TheLuminousOne hilarious
Hund is actually canis vulgaris in German. 😂
Hund lived to be 101.
Born 4 February 1896 - died 31 March 1997; good Lord, the things the man saw!
What a wonderful person! This is humanity at its best!
I never thought color videos of this guy existed. It’s nice to hear the thoughts of a genius.
I always imagined dirac died like a a hundred years ago lol
Oh my God, what a wonderful video! I am so greatful finding here on this channel! It is really amazing! And the two interview partners are absolutely divine, both Paul A. M. Dirac and Friedrich Hund! ❤❤❤✨️✨️✨️🍀🍀🍀✨️✨️✨️🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
A darling man to watch and hear speak 🥹 Thank you for the upload!
It's interesting to observe how the concept of symmetry has changed subtly since this discussion.
Dirac is talking about a symmetry between space and time as though these are two different things having a connection whereas these days I think we regard space-time as a continuum and the symmetries we talk about are 'internal' symmetries as understood by Noether.
beautiful conversation between great creators of physics; thanks for uploading this video!
Two brilliant minds .RIP to both of them
I wonder how long it takes to have another human being like him on earth, wonderful mind, wonderful human
Is me Fiorella🤤
Not still born
Me voilà, de quoi tu parles ?
@@johntower2005 excusez c’est sûrement de ma faute si je ne connais pas johntower
Maintenant tu me connais petit chou
Feel honoured to be able to enjoy this.
May this be availably to humantity for ever! Imagine we could watch and listen to Plato explaining the Cave Anology! Sapere aude... ThanX4TheUpload!
Paul Dirac the greatest physicist that nobody has heard of 😢😢
He was a living legend 🙌 😮
Huge impact to our lives and most people have never heard of him. He reminds me of Roger Penrose
Even Penrose is only touching the tip of the iceberg but yes most people sadly don’t even read at all. This is all old news tho
@@r3b3lvegan89 I meant the accent and general demeanor.
Dirac is such a fucking icon man I swear
@@r3b3lvegan89Dirac’s equation is not something one randomly reads but yes, people hardly read now.
Its wonderful to see and listen to Dirac. Thank you for posting this great video!
This is a not a lecture rather than it's a jewel 💎 for thinkers 🤔💭
Thanks for uploading. It is a gem.
Grest discussion! not only on content wise but also for the trilingual sense i felt.
I wonder whether Douglas Adams was thinking of the Fine Structure Constant when he wrote about the ultimate answer to life, the universe and everything.
Hund discovered the so-called tunnel effect or quantum tunneling and Hund's rule of maximum multiplicity....First discovery is a simple description of interaction of charged (magnetic) particles at the proximity and the second discovery is a simple energy law related to the thermal motion of atoms/ions/molecules in the closed volume adapted to the spin possessing particles...these rules are naturally appearing in the mind when posing correct questions and knowing what electron is
Danke für das hochladen.🙂I am really impressed on great thinking.
Hund kept interrupting not letting Dirac finish his sentence but wonderful recording
Fun fact: Back in the Leipzig days, when Leipzig was the world's epicenter of theoretical physics, Heisenberg and Hund did a series of shared lectures. It was called "Heisenberg mit Hund" (literally: "Heisenberg with his dog"). It was a well received event and probably of greater impact and reputation than Feynman's lectures later. The title was a pun in German, but it showed that Heisenberg outranked anybody at the institute.
He was more of a dog person than a cat person then. He left his cat in a box - unsure if it was dead or alive.
@@hut8_newzealand361 badump-bump
@@hut8_newzealand361WHAT?!?!?!!! I DO hope the "Cat Protection League" was alerted!
@@hut8_newzealand361 that’s Schrödinger
No, it's not "literally Heisenberg with his dog"... It's just Heisenberg with dog. They were not this disrespectful, come on.
Awesome discussion and footage 👏
Dirac, a legend who lives on for the many centuries to come.
Here, it is about how the both undoubted and esteemed Peers are in fact recalling the ways of how the Professional Mankind could aptly circumvent the over-all ignorance as to some important points to nonetheless duly succeed with all their epistemic exercises, however, still without clearly answering important basic posers.
A very nice illustration of the general trend... Many sincere thanks for posting this!
So what was the conclusion of the Viking lander / Mars radar wave experiments?
Interview with legendary Paul Dirac. Excellent 👌👍
This is what going to the source means and why it is important; words directly said by the speaker instead of relying on the words of another who claims to have witness this talk.
Rest in peace Paul Dirac and Friedrich Hund.
Blown away. I just wish Dr. Hund had let Dirac speak more than him. Every word out of his mouth is a treasure.
Thank you for uploading this video.👍
What a classic and wonderful interview between 2 charming men !!
that was a great interview/lecture. Thank you.
Very interesting. Magic to see the old master expounding.
Interesting aside:
Dirac and Cary Grant playing in the same playground at Bishop Road Primary School (Bishopston, Bristol) in the early 1900's.
One of my grad school professors hosted him in the early 1980s and told us several stories about him. Apparently he hardly ever spoke.
he barley speaks here.
It is so.
@@jonathannesbittYes.
Wow. Real voice of a historical figure who worked in the time of the WW2. There are many of this era whose voices I would like to hear.
this sincere work in hysics has brought them automatically to a heartfull attentivity . Unfortunatey they did not go ahed with this.
I thought this might show his legendary weird personality but he just seems to be a very good listener here.
Love the inverted pencil in the top pocket !
I never thought I would hear Dirac speak on camera. I was so wrong about his lifespan.
at around 15.30 to 16.00 Hund talks about Dirac large numbers 10to40 and 10to80 but the subtitles wrongly show 10to14 and 10to18 . An auto generation confusion and sometimes non-natives too.
Thank you! I just fixed those numbers.
Incredible, first time I've heard the great man talk
A Dirac: a unit of silence. The least number of words that can be spoken to convey an idea.
wow, what a fantastic discussion.
Dyson and Dirac were probably the best applied mathematicians in history
Don't forget Sir Isaac!!!
Hamilton is up there too!
I enjoyed using my Dyson Air Purifier 😊
@@robjohnston1433 Newton was probably the best Physicist in history in all fairness. He was more physics than maths
exchange Dirac with Neumann and you're there
Prof Hund's statement concerning unification is just as valid today in 2023.
Great find. Thanks.
Paul Dirac was brilliant in ways I will probably never really understand.
fascinating insight into thinking at that point in time
Thank you Mr Dirac. I love you
With highest regards to Prof Dirac....an exponent of Physics.
Their personalities come together the way negative and positive charge attracts.
Huge upload!
Dirac was born and raised in Bristol England yet, he has a very pronounced accent. I wonder what the story is behind it.
His father was a French-Swiss and forced his family speak French at home. That may be a reason.
@@sabahattinsakman7985I heard a French physicist visited Dirac and practiced his weak English for many weeks prior to the visit so as to better converse with the Englishman. When leaving after an apparently frustrating discussion due to the language barrier, Dirac turned and spoke in perfect French to a housekeeper.
Einstein had the great advantage of being well acquainted with Emmy Nöther’s work on symmetries.
theres no way that woman did that by herself
How does this only have 270,000+ views?? How??
Two great mind! Living forever in every inquiring mind!
Dirac should be a name every child learns
The guy is still very sharp ...great interview and insight 👍
17:39 On "renormalization" - A must see for theoretical phisicists...
This is excelent essence material! Much oblige
Excuse me, but who is interviewing whom here? Thank you from Oslo.
what did we get from that radar deal?
"Once, Kapitza gave Dirac an English translation of Dostoyevsky’s Crime and Punishment and asked him to read it. Later, when Kapitza asked if he had enjoyed the book, Dirac’s only comment was: “It is nice, but in one of the chapters the author made a mistake. He describes the Sun as rising twice on the same day.”"
😃
This is what it looks like when 2 people care only about the science. Not about correctness, politics, reputation, etc. All that matters to them is what Feynman once said, "It does not matter if a theory is elegant. It only matters if it's actually going on in the real world." (I may not have the exact wording). These 2 brilliant men only cared about describing how the universe actually operated.
I'm still fuzzy on the wavefunction/spin dualism (not enough to confuse iso-octane.)
Friedrich Hund was famous for the Hund rules. Gottingen had a lot of brilliant people back in the 1920s and before.
Poor Poincaré never gets credit for Relativity even though it was he who first discovered the symmetry contained in Lorentz's work, not Einstein. And it was Poincaré's work that Minkowski relied more heavily on in building his models of spacetime.
But Poincare missed the most revolutionary aspect of Einstein's Relativity: that time is not constant. This allowed the full understanding of the revolutions of QM and GR.
@@rayfranco1256 He did so in his essay "The Measure of Time" of 1898. He concluded with the measure of time writing: The simultaneity of two events, or the order of their succession, the equality of two durations, are to be so defined that the enunciation of the natural laws may be as simple as possible. In other words, all these rules, all these definitions are only the fruit of an unconscious opportunism.
@d-nihilus4422 👍👍 On peut même dire que Minkowski a carrément plagié les travaux de Poincaré, notamment " le mémoire de Palerme" !!!
is there a transcript of this interview?
You see those 3 dots? Select them and choose "show transcript".
A lot of this is, obviously, well out of date. The introduction of the Rockwell Retro Encabulator saw an end to such esoteric discussions between intellectual giants, largely as a result of the malleability of the hydrocoptic marzelvanes and the logic output of many differential girdlesprings into the college undergraduate physics syllabus.
False, Poincaré did understood the group symmetry of the Lorentz transformation largely before Einstein.
In fact Lorentz in 1921 did recognize that those transformations where mainly from Poincaré.
Poincaré was a bitter, stereotypical frenchmen, who never got over it that Einstein killed it and put all the pieces of the puzzle together before him, despite the fact that he had worked on the topic for far longer AND DID NOT unterstand what he was doing or what nature was doing. He left no chance unused to belittle and despise Einstein afterwards, pushing his narrative despite the fact that you can clearly see in his papers that he was beating around the bush without getting the physics and without having the mathematical capabilities to understand the abstract meaning of the formalism. Whatever Lorentz said or didn't say, they did not come from Poincaré and Poincaré DID NOT understand them until way later.
That was another thing to deeply dislike about him: He was a Monday morning quaterback. After Einstein conceived special relativity and even introduced the Minkoswski metric without noticing it at that point, suddenly Poincaré claimed that all of it was so easy and so clear and so apparant, especially to him.
Typical unlikeable idiot.
He didn't recognise the physical interpretation though.
@JeanPinard Apparemment, ces gens n'ont jamais entendu parler de Poincaré, et de ses travaux sur les transformations de Lorentz (qu'il a d'ailleurs lui même baptiser ainsi )?! j'hallucine !!!
Legendary man !! Paul Dirac.
Seeing them in video is amazing experience....only heard read their names in books....they are blessed by god
Now I wonder whether the questions about the mass ratios between proton and electron and other particles were ever settled.
Paul Dirac a true genius 😮😮😮
I like the fact that they hope to get unified theory pretty soon. I started reading about this topic in the 90's and physicists hoped we will get the theory soon after year 2000. Now over quarter in the 21'st century we are still nowhere near.
We haven’t had anyone like Paul dirac or people on his level since then.
People now have become more selfish.
The brightest people just take a medicine, computer sci or engineering degree just to make money.
The culture of contributing to Physics and it’s natural philosophy is dying.
I guess it makes sense for a subject like physics which won’t technically bring personal benefit. Sad.
마치 끝나지 않는 퍼즐처럼 지금도 살아있는 확신이 듦.
So fascinating
Great man
17:41 renormalization technique inadequate
I wonder whether Weyl’s invariance addresses this inadequacy that Dirac raised.
Mr Dirac mind was a fantastic one and so sharp at his age, he has been at the forefront of Physics, however his reaction to R. Feyman QCD theory and renormalisation was however a bit conservative and "cold".
outstanding!!!
Are we sure that Paul Dirac and John Carpenter are not the same person? Anyone ever seen them in the same room together?
If anyone fancies a nice deep dig into the biog of this wonderful human being, I recommend Graham Farmelo's book, 'The Strangest Man'. Somewhere in the book's notes, you'll find a formula Dirac invented that totally ruined a college mathematical game for good.