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Aug
4
comment Is a Perfect/Lossless Mirror possible?
Note that even if intensity is preserved, there will be loss of phase-information. An essential quality of a mirror is that it preserves phase so you can do for example a diffraction experiment.
Jun
25
comment Will a relativistic rocket be destroyed by incident photons?
Fast atoms will not necessary do any damage. Since they go fast the damage that they can produce in a given material thickness will be negligible. Am I missing something? For example, en.wikipedia.org/wiki/Stopping_power_%28particle_radiation%29
Apr
3
revised Phonon carries zero spin. Why?
added 77 characters in body
Mar
31
answered Phonon carries zero spin. Why?
Dec
17
awarded  Student
Dec
17
comment Name for thermodynamic derivative $dP/dT|_V$?
@NickKidman, thank you, yes simply related quantities, including dimensionless, with given names, are also welcomed. I added that to the question.
Dec
17
awarded  Editor
Dec
17
revised Name for thermodynamic derivative $dP/dT|_V$?
example for related quantities
Dec
17
comment What happens to internal energy in high-density materials?
Does the angular momentum of a black hole contribute to its internal energy?
Dec
17
asked Name for thermodynamic derivative $dP/dT|_V$?
May
24
awarded  Teacher
May
23
awarded  Supporter
May
23
answered What is the most energy efficient way to boil an egg?