If light has energy but no mass, how can it have momentum?

Question

If light has energy but no mass, how can it have momentum?

In: 55

Answer 1

Light is like a wave that carries energy and momentum, and photons are like tiny balls that make up the wave. When light hits something, the photons can bump into the thing and transfer some of their energy and momentum to it, like when you throw a ball and it hits something. Even though the photons are very light and can’t be weighed, they still have energy and can make things move.