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

The fact that something is there, that affects the space-time, is enough. Light does not need any mass to bend around a gravity field, because space itself does it, the light is still happily travelling “straight” forward.