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12h
answered How is a vacuum able to propagate light?
13h
comment What constitutes an answer to a physics question on this forum?
As a comment of mine is used as an illustration, I want to stress that comments are comments and answers are answers, on this site. A comment expresses opinion and is not an answer which must be based on peer reviewed physics *( preferably with links) or standard textbook physics. .
16h
comment Compton effect in photo-electric?
@aquirdturtle we are talking at cross purposes. The compton effect, I have given a link in my answer, is about scattering of a photon off an electron, and might be extended to scattering of a photon off a field , where the generator of the field takes up the momentum balance. The spectrum is continuous. The photoelectric effect gives a lower bound to the rebounding momentum of the electron, and this implies bound states with a specific ionization energy , I also gave a link in the answer. If the electrons on the metal surface were not quantum mechanically bound, there would be no cut off.
16h
revised Compton effect in photo-electric?
clarification
17h
comment Compton effect in photo-electric?
@aquirdturtle my comment addresses the photoeletric effect, which is not compton scattering. Of course photons can scatter off the field of atoms, that is not what the question is about, imo
17h
comment Compton effect in photo-electric?
@aquirdturtle If the particle it scatters off is bound, one needs a photon with the ionization energy, which means quantized steps and the photon is absorbed in the process. It is a specific feynman diagram. see the link
21h
answered Compton effect in photo-electric?
22h
answered Is the video “How to Reveal Subatomic Particles at Home”'s explanation of its experiment misleading?
23h
answered How do free electrons conduct heat in a metal?
1d
comment Measurement without collapse
maybe this later publication can help univaq.it/~serva/research/publications/1992-measurem.pdf
1d
comment How does negative energy from Hawking Radiation cause a Black Hole to shrink?
@turibe have a look en.wikipedia.org/wiki/Micro_black_hole .. Hypothetical but maybe possible.
1d
comment How does negative energy from Hawking Radiation cause a Black Hole to shrink?
@turibe No, the numbers statistically of matter and antimatter would be equal but when one does the calculations the evaporation is very very slow , "Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe." these energies are not enough to create e+e-. en.wikipedia.org/wiki/Black_hole
1d
revised Cherenkov radiation can it happen in a jar using tap water with 8 thorium laced lantern mantles as a radiation source
edit after edit of question
1d
comment is the potential energy of a black hole infinity
@CuriousOne am I wrong to observe that the concept of potential energy was "invented" in order to keep/identify the law of energy conservation? It is an upside down view, but that should be OK. In a similar way the E=mc2 still keeps energy conservation intact.
2d
awarded  experimental-physics
2d
comment Why do some substances undergo sublimation while others do not?
you should give a link for the phase diagrams en.wikipedia.org/wiki/Phase_%28matter%29
2d
comment Looping fractal paradox
No it is not. the standard model en.wikipedia.org/wiki/Standard_Model of particle physics together with the big bang model en.wikipedia.org/wiki/Big_Bang cover the current accepted models .
2d
awarded  Guru
2d
comment is the potential energy of a black hole infinity
@CuriousOne I am simply stating that the usual way of exchanging kinetic with potential energy in classical mechanics with a test particle, cannot work in the realm of GR .
2d
comment Is the empty space really empty?
@Qmechanic the above is also for you