Recent content by dupont

dear JesseM The equivalence principle (ep) has two formulations, either the free fall-inertial frame one or the standing still-accelerated frame one. 1) If the principle has any meaning, I must be able to transpose the results from one situation to the other. Spacetime changes then must be...

Neutrinos are usually emitted at high energy (several keV to MeV). Their mass, if it exists, is <1eV, so their speed is close to c for any experimental situation on earth. In principle, it is possible to have "slow" neutrinos emitted from particle beams in the backward direction. The beam must...

I have been thinking about this lately in the context of momentum loss of radiation upon passage through a diluted plasma. Momentum loss from stationary plasma should red-shift radiation. I found that there is no momentum transmitted from radiation field to electron if the em field is linearly...