Can we compute relativistic velocities of photons and neutrinos?

[petrushkagoogol]

Can we compute the relativistic velocities of 2 photons or 2 neutrinos ?

 

[jbriggs444]

Can we compute the relativistic velocities of 2 photons or 2 neutrinos ?

Can you give a little context? What do you mean by "relativistic velocity" and which two photons or which two neutrinos do you have in mind?

 

[petrushkagoogol]

Any two that originate from the same source.

 

[Dale]

The speed of photons is c. Neutrinos may have any speed < c.

 

[petrushkagoogol]

The speed of photons is c. Neutrinos may have any speed < c.

Does this imply that neutrinos have rest mass ?

 

[Orodruin]

Does this imply that neutrinos have rest mass ?

The implication goes in the other direction. Neutrinos have mass, therefore they can have any speed < c.

 

[Dale]

Does this imply that neutrinos have rest mass ?

Yes, neutrinos have rest mass.