In relativistic speeds, when calculating the total energy of an particle, I use the formula Eˆ2= mˆ2*cˆ4 + pˆ2*cˆ2. If i use eV as unit for the rest masses m, which unit should I use for the momentum p? eV/c or just plain eV * m/s (only affeciting the value of p I guess) ?

Question

In relativistic speeds, when calculating the total energy of an particle, I use the formula Eˆ2= mˆ2*cˆ4 + pˆ2*cˆ2. If i use eV as unit for the rest masses m, which unit should I use for the momentum p?  eV/c or just plain eV * m/s (only affeciting the value of p I guess) ?

binary3i · Answer

what is eV/c is it even a unit?
do you mean c the speed of light.
eV*m/s seems satisfying......

anonymous · Answer

Well, I actually found out the answer myself. One often use eV/c as unit for relativistic momentum to get a more manageable number. So, you divide the value you get with c so you can write the unit as eV/C instead of eVs/m. Yes, c is the speed of light

binary3i · Answer

well i guess
E=MC^2
MC=E/C   where energy of the photon is eV and c the speed of light