Because
nothing, that has mass, can travel at the speed of light
( , Tue 31 Mar 2015, 22:38, Share, Reply)
nothing, that has mass, can travel at the speed of light
( , Tue 31 Mar 2015, 22:38, Share, Reply)
What about photons then, they have mass AND can travel at the speed of light.
( , Tue 31 Mar 2015, 23:15, Share, Reply)
( , Tue 31 Mar 2015, 23:15, Share, Reply)
they have zero rest mass
en.wikipedia.org/wiki/Photon#Experimental_checks_on_photon_mass
( , Tue 31 Mar 2015, 23:24, Share, Reply)
en.wikipedia.org/wiki/Photon#Experimental_checks_on_photon_mass
( , Tue 31 Mar 2015, 23:24, Share, Reply)