Richard Feynman Lecture on Quantum Electrodynamics: QED. 1/8

Part 2: http://www.youtube.com/watch?v=rKjpk3dkIZI
Richard Feynman gives us a lecture on Quantum electrodynamcis, the theory of photons and electron interactions which incorporates his unique view of the fundamental processes that create it. one of the 3 winners of the 1965 Nobel prize in Physics for his work, Feynman is was an expert on quantum mechanics and developed the Path Integral formulation of Relativistic Quantum mechanics, used in Quantum Field Theory, interpreted the Born series of scattering amplitudes as vertices and Green's function propagators in his famous diagrams, the Feynman Diagrams, and also worked on the fundamental excitations in Liquid Helium leading to a correct model describing superfluidity using phonons, maxons and rotons to describe the various excitation curves.
other fields of work include the Feynman-Hellmann Theorem, which can relate the derivative of the total energy of any system to the expectation value of the derivative of the Hamiltonian under a single parameter, e.g volume.
he also worked on the Rogers Commission report during the investigation of the 1986 Space Shuttle Challenger disaster, where Feynman famously demonstrated how the Booster Rocket O-rings, which are elastic sealing joints, became less resilient and subject to seal failures at ice-cold temperatures by immersing a sample of the material in a glass of ice water- his high intelligence and independant way of looking at the world often made him "a real pain" in the eyes of other, less skilled, Commission members.
Feynman's own investigation reveals a disconnect between NASA's engineers and executives that was far more striking than he expected. His interviews of NASA's high-ranking managers revealed startling misunderstandings of elementary concepts, such as safety proceedures.
Although Feynman got plenty of media coverage due to him being on the Commission, he was often told to stay quiet about NASA's more sinister secrets and tactics in space exploration.

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[dreaminglucidly139]

I'm a biologist and I treasure this too. Feynman is incredible: he makes me want to go back to undergrad, learn physics, and apply what I learn to bio.

[MuonRay]

@achintyagopal1486 Maybe. Though they don't have to be. This is the internet; elitism has no merits here. watch it if you are a scientist, science student or graduate yes, but also if you are intersested in it. anyone can, and should, watch it, just as people should acknowledge the contrabutions that everyone makes each day. we should all realise that those who grow are food and those who keep our cities and planet safe and clean are just as valiant, even more so in my books.

[PelicanGodOfJupiter]

Anyone know where I could see the whole lecture?

[4kx]

He was great physicist and great speaker

[cxaxnxexs]

@dreaminglucidly139 Haha so funny. I am a engineer/physicist & watching his "The Character of Physical Law" lecture on symmetry in physical law he makes me want to study biology! Biological systems are so beautiflly complex it is like perfect engineering at work. In fact, many engineering & physics breakthroughs (feeback control theory, fluid modeling, etc.) came from some biological principle (Fibinacci sequences in nature, bumble bee flight, etc. etc.). VERY cool stuff!

[jamespowell1969]

our not are

[JayMark2049]

@dreaminglucidly139 You don't need to go to school to learn physics.

[eatingtacos000]

I've seen this whole lecture 3 times. I just love it. Im so happy Im alive at a time where such amazing things are known!

[funkit22]

@MuonRay well said

[HORRORTV1]

@achintyagopal1486 I'm still in highschool, but I'm interested this.

[DanFrederiksen]

@Fnordicus quite irrelevant when he claims to have formalized a theory in the 40s for everything except nuclear workings and gravity