Question

Is p=E/c valid for electrons ?Pls explain too
p=momentum
E=energy of photon
c=speed of light

Answer 1

sorry,E= energy of electron

Answer 2

is this for quantum physics?

Answer 3

i dont know

Answer 4

hmm i can give you a link it might be able to explain it better than i can

Answer 5

http://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalence
if you go to this link it is easier to understand if you need more help please don't hesitate to ask

Answer 6

It would be a good approximation for relativistic electrons, that is electrons travelling at almost the speed of light.

p equals exactly E/c for particles with zero mass, namely photons.

Answer 7

@BleachSta4Ever :) thanks ... i will do that
@Vincent-Lyon.Fr so that equations only works for particles with infinitesimal mass and with speed of light, like photons

Answer 8

Yep!