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Oct
17
revised Second Law of Thermodynamics…confusion over an example
added 820 characters in body
Oct
17
comment Second Law of Thermodynamics…confusion over an example
No, light from the sun is distributed in solid angle. The solid angle distribution is important to the thermodynamic characteristics.
Oct
17
answered Second Law of Thermodynamics…confusion over an example
Oct
15
comment Average of $\sin^2 \omega t$, $\cos^2 \omega t$ for long times
I think you wanna drop the square on the cosine in the right hand side.
Sep
26
answered Why don't charges move transverse to an EM wave?
Sep
19
answered Why do wave packets spread out over time?
Sep
18
awarded  Supporter
Aug
14
answered If I replace all my lights with LEDs will my heating costs increase?
Apr
11
awarded  Editor
Apr
11
revised How does one find the wave velocity and the phase speed?
added 726 characters in body
Apr
10
comment How does one find the wave velocity and the phase speed?
No, by 'speed' I mean speed. Both the high frequency component an low frequency envelope are translated at the same speed 'v'.
Apr
10
awarded  Teacher
Apr
10
answered How does one find the wave velocity and the phase speed?