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bio website sjbyrnes.com
location Massachusetts
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visits member for 3 years, 5 months
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3h
awarded  Nice Answer
Nov
10
revised Definition of mean free time in the Drude model
reference the "inspection paradox"
Nov
10
comment How to convert RGB values to physical radiometry and/or photometry quantities and back?
A few nitpicks... All modern displays and printers use sRGB, which is gamma-corrected. So you're correct that it's not logarithmic. But it's not linear either. Also, plenty of hardware can provide more accurate colors than 255-255-255, even though not all programs take advantage. See en.wikipedia.org/wiki/Color_depth
Oct
28
revised Johnson-Nyquist noise for resistive element with temperature gradient
added 834 characters in body
Oct
28
answered Johnson-Nyquist noise for resistive element with temperature gradient
Oct
22
comment How to distinguish between the spectrum of an atom in motion and the one of a scaled atom?
OP's description isn't correct, and this is a good proof. Upvoted! However, there is something along those lines that works. If I set hbar = c = 1, I can scale all quantities with units of eV^N by a factor of 10^N. So I would increase masses and energies and frequencies by 10X, I decrease lengths and durations by 10X, etc. That would definitely be a consistent way to scale the wavelength of every spectral line. See my answer.
Oct
22
revised How to distinguish between the spectrum of an atom in motion and the one of a scaled atom?
added 517 characters in body
Oct
22
revised How to distinguish between the spectrum of an atom in motion and the one of a scaled atom?
added 20 characters in body
Oct
22
answered How to distinguish between the spectrum of an atom in motion and the one of a scaled atom?
Oct
22
comment How to distinguish between the spectrum of an atom in motion and the one of a scaled atom?
Can you be more specific? Don't forget, the question is "if we decrease all the masses, does it result in decreasing all the emitted photon frequencies by the same ratio?" So the energy levels are supposed to be proportional to the masses. When you say that the hyperfine structure is proportional to me/mp, are you sure you're talking about the absolute energy level differences, rather than some ratio of splittings?
Oct
18
revised Low-cost 532nm DPSS laser modulation
added 266 characters in body
Oct
18
answered Low-cost 532nm DPSS laser modulation
Oct
18
answered Stimulated emission in Nd:silica glass, energy levels broadening and lasers
Oct
12
comment Experimentally diminishing random errors for low wavelength UV observations
It's not just photon shot noise right?
Oct
9
comment What challenges needed to be overcome to create (blue) LEDs?
Oops, maybe my info is out of date. Last I heard they could only make bluish-green. :-P
Oct
8
awarded  Necromancer
Oct
8
awarded  Good Answer
Oct
8
awarded  optics
Oct
7
awarded  Nice Answer
Oct
7
answered What challenges needed to be overcome to create (blue) LEDs?