If light has no mass, how does gravitational force bend light inwards

Question

In the case of black holes, lights are pulled into by great gravitational force exerted by the dying stars (which forms into a black hole). If light has no mass, how is light affected by gravity?

In: 784

Answer 1

My understanding is that light (photons) do have mass, but it’s very, very miniscule which is why gravity sources bend light. I could be wrong however so might want an answer from an astrophysics.