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 Yearling
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  • 0 posts edited
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  • 57 votes cast
Nov
21
asked Is Wikipedia wrong about Huygens-Fresnel Principle?
Oct
14
answered Why is absorption spectrum a line spectrum?
Oct
5
answered Counting Problems in Physics
Sep
1
comment Is it possible to have things orbit around us?
Yes, I see. It is the same constant, give or take a factor of 2*pi or so.
Aug
31
comment Is it possible to have things orbit around us?
Yes, you did it very cleanly. I'm surprised that time and density are related by a universal constant.
Aug
31
answered Is it possible to have things orbit around us?
Aug
20
comment How to interpret physical quantities in a superposition state?
I like where you say this is one case where superposition "can't even pretend to be mysterious."
Aug
7
answered Why do we say linear molecules only have 2 rotational degrees of freedom? Why does the third 'frozen' one not count?
Jul
30
answered How is this possible that photons are absorbed?
Jul
20
comment What's wrong with this argument that aerodynamic lift really does rely on Bernoulli?
@Dunlavey And yes, I've been a big fan of the John Denker website since I first saw it about ten years ago.
Jul
20
comment What's wrong with this argument that aerodynamic lift really does rely on Bernoulli?
The wing pushes air down because of the angle of attack. But I don't know any way to calculate exactly HOW MUCH air gets pushed down, either from the angle of attack or by some kind of Bernoulli's Principle analysis. But assuming that the wing is actually functioning properly (not stalling or anything like that) I think you'd get a pretty good estimate by multiplying the effective cross section by the velocity of the airplane.
Jul
19
answered What's wrong with this argument that aerodynamic lift really does rely on Bernoulli?
Jun
24
answered Relation between power & thickness of the filament
Apr
23
awarded  Yearling
Mar
30
comment Why do lines in atomic spectra have thickness? (Bohr's Model)
Thanks for the edit, Noah. And thanks for my first lesson in LATEX. Now I know that the code for 10^(-8) is DOLLARSIGN\ 10^{-8}DOLLARSIGN (with actual $'s instead of DOLLARSIGN).
Mar
30
awarded  Custodian
Mar
30
reviewed Approve Why do lines in atomic spectra have thickness? (Bohr's Model)
Mar
29
answered Why do lines in atomic spectra have thickness? (Bohr's Model)
Mar
21
comment Can quantum fluctuation happen outside space-time?
It's easy to make fun of an outsider who asks this kind of question. But it seems to me that serious physicists are responsible for the claim that "the big bang was the result of some kind of quantum fluctuation". If that's the kind of statement that legitimate physics deals with, then I really don't see what's wrong with the question. Because it's about as meaningful as the statement which inspired it.
Mar
20
comment How wrong are the classical Maxwell's equations (as compared to QED)?
Thanks, @FraSchelle. What is especially baffling is that more than 100 years into the new paradigm that is quantum physics, I am still considered a kook on the internet for drawing attention to these obvious and readily verifiable truths.