from where the light photons get energy to move at such a high speed?do they keep on moving forever?

Question

from where the light photons get energy to move at such a high speed?do they keep on moving forever?

In: Physics

Answer 1

You do not need energy to keep moving if you are already moving and are not affected by friction, resistance etc. You need energy to gain speed, that is, to accelerate, the more mass you have, the more energy you need. Photons do not have a rest mass. This is why they do not need energy to move at all and move forever.