4 ms·
What about a photon? If I use light to transmit information have I given it mass?
by loourr 7y ago
What about a photon? If I use light to transmit information have I given it mass?
- nabla9 7y agoYou forgot the mass-energy equivalence. Photon has no rest mass, but it's energy is equivalent to some mass. Photon's stress–energy tensor causes similar effect on gravitational field as tiny amount of mass equivalent to the energy of a photon.
- superfist 7y agoSo basically we have rest mass and relativistic mass. How those two compare? And when we say: energy - mass equivalence we actually mean energy - relativistic mass equivalence?
- YayamiOmate 7y agoNo. You gotta be extra careful when you introduce relativistic mass. Photon has momentum, zero rest mass. Energy mass equivalence says that you can annihilate mass to create a massless particle. This is true for all the observers. Relativistic mass is a perceived mass dependent on the observer.