Are quanta particles or waves?

Are quanta particles or waves? The title of this post is an age-old question isn’t it? Particle or wave? Wave or particle? Many have rightly argued that the so-called “wave-particle duality” is at the very heart of quantum weirdness, and hence, of all of quantum mechanics. Einstein said it. Bohr said it. Feynman said it. …

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Time and Memory

Over the holiday I started digging through my mom’s old albums and boxes of photos. I found some pictures I didn’t know existed! Richard Feynman and the 19 year old me at my Caltech graduation: With my mom that morning — hung-over, but very happy! I think those are some crazy old school Ray Bans …

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Feynman’s War

Radar and nuclear weapons could not have been developed without the big brains. Feynman’s War: Modelling Weapons, Modelling Nature Peter Galison* What do I mean by understanding? Nothing deep or accurate—just to be able to see some of the qualitative consequences of the equations by some method other than solving them in detail. — Feynman …

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Feynman Lectures: Epilogue

The full text of The Feynman Lectures is now available online. These lectures were originally delivered to satisfy the physics requirement for first and second year students at Caltech. Legend has it that as the lectures went on, fewer and fewer undergraduates were seen in attendance, with their places taken by graduate students and even members …

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