berkeman's latest activity
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The same condition that is satisfied when a book is at rest on a table top. Here you have a bead and a ring but the condition is the same. -
berkeman replied to the thread Collection of Lame Jokes.Is it still from the christening incident? https://media1.tenor.com/m/BL1zq_21XDcAAAAd/caddy-shack-boat.gif
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berkeman replied to the thread B Simple mass/scale puzzle.I think you meant to describe it in a different way. If you fix the left pulley and cut the cable at the left weight, the left cable...
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berkeman replied to the thread Collection of Lame Jokes.Potato, Potahtoh... :wink:
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berkeman reacted to Andy Resnick's post in the thread A When should I analyze optical problems using ray tracing vs. wavefront analysis? with
Informative.
The branch of optics characterized by the neglect of wavelength (the limiting case of λ→ 0) is geometrical optics, which models the... -
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People who have been filled with helium speak very highly of the experience.
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One time I was goofing around with a gieger counter measuring radioactivity around and about the lab. Ran into this professor who had a...
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Yup, even when it's fake. https://www.snopes.com/fact-check/abducted-scientist-make-dog-immortal/
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‘Robo-Bunnies’ Are the Newest Weapon in the Fight Against Invasive Burmese Pythons in Florida...
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berkeman reacted to Dale's post in the thread I Mechanism of Energy Conservation in Zero-Amplitude Sum of EM Waveforms with
Like.
It isn’t. Can you see why? Think of the Poynting vector. In the field that is not canceled. E.g. if there is complete destructive... -
berkeman replied to the thread I Mechanism of Energy Conservation in Zero-Amplitude Sum of EM Waveforms.No. You are not asking about two parallel beams propagating in the same direction. You are asking about two opposing beams -- have you...
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berkeman replied to the thread I Mechanism of Energy Conservation in Zero-Amplitude Sum of EM Waveforms.How do two opposing waves maintain this 180 degree phase offset?
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berkeman commented on Yehudi H Moraes's profile post.Welcome to PF. :smile:
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New models take years to develop. One man and ChatGPT are not sufficient enough to write a new theory. This forum is for established...
