bhobba's latest activity
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bhobba reacted to neilparker62's post in the thread Prove that ## 4\tan^{-1}\left[\dfrac{1}{5}\right]- \tan^{-1}\left[\dfrac{1}{239}\right]= \dfrac{π}{4}## with
Like.
"All in one" derivation of compound angle formulae - based on the video construction. -
bhobba reacted to neilparker62's post in the thread Prove that ## 4\tan^{-1}\left[\dfrac{1}{5}\right]- \tan^{-1}\left[\dfrac{1}{239}\right]= \dfrac{π}{4}## with Like.
Neat geometric derivation of ##\tan(A+B)=\frac{\tan A + \tan B}{1-\tan A \tan B}## if we divide all terms in ##\frac{ay+bx}{by-ax}## by...
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bhobba reacted to Morbert's post in the thread Graduate How valid is the indivisible interpretation of quantum mechanics? with
Haha.
He should have watched this video -
bhobba reacted to gentzen's post in the thread Graduate How valid is the indivisible interpretation of quantum mechanics? with Like.
The discussion did not just "feel" more substantive. What I have watched so far (~1h 43min) was factually a lot more substantive than...
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bhobba replied to the thread Graduate Penrose-Dosi Model.Well said. And, at least in principle, it is experimentally testable. Plus, listening to a scientist of his stature is always a joy...
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I feel he had a nice idea -- gravity causes collapse. He put out some heuristics on how to look for it. The experimental community...
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The OP is presumably referring to the Diósi–Penrose model: https://en.wikipedia.org/wiki/Di%C3%B3si%E2%80%93Penrose_model
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bhobba reacted to DaveE's post in the thread High School Reducing loss of energy for Lasers with Like.
Yes, they do. Single frequency TEM00 propagation is a thing people have been using for nearly 50 years. About as perfect as anything in...
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bhobba reacted to berkeman's post in the thread High School Reducing loss of energy for Lasers with Like.
I was at a photonics trade show many years ago, and as I walked down one of the aisles, I heard a "snap, snap" noise every few seconds...
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bhobba reacted to DaveE's post in the thread High School Reducing loss of energy for Lasers with Like.
Do you mean the laser beam, or the entire laser? What's in the vacuum? There are some laser applications that require a vacuum, but...
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bhobba reacted to PeterDonis's post in the thread High School Reducing loss of energy for Lasers with Like.
This is not a valid reference. Can you find a valid reference (textbook or peer-reviewed paper would be best) that says what you're...
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bhobba reacted to berkeman's post in the thread High School Reducing loss of energy for Lasers with Like.
@Josiah -- Please take care not to try to reopen a closed thread. Your previous thread on this question was closed because you veered...
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bhobba reacted to anuttarasammyak's post in the thread High School Reducing loss of energy for Lasers with Like.
Not only laser but light in general do not lose energy in vacuum. Laser beam go in one direction. A beam receiver get the energy...
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bhobba replied to the thread Undergrad "The wavefunction never collapses".It can be found in Lenny Susskind's book on QM: https://www.amazon.com.au/Quantum-Mechanics-Theoretical-Art-Friedman/dp/0465062903...
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bhobba reacted to PeterDonis's post in the thread Undergrad "The wavefunction never collapses" with Like.
Please note that you should not require any simulations in order to see the basic idea in the math; for a simplified scenario like...