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

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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?

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Anonymous 0 Comments

gravity curves space itself.

imagine light is a spongey cylinder rolling along. when it passes a source of gravity, the end of the sponge closer gets compressed by the gravity more than the end farther away. The cylinder is now tapered, and when it rolls once, the part with less gravity has larger diameter and larger circumference and rolls farther.

the cylinder has now turned towards the source of gravity.

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