The conversation between human and AI assistant.
What is the speed of a photon falling in a black hole?
So, how is the speed of light affected by a black hole's gravity compared to the gravity of a planet or a star?
Near a planet or a star, the gravitational force is much weaker than near a black hole. So, the effect on the speed of light is much smaller. For instance, the bending of starlight near the sun during a solar eclipse was predicted by Einstein's theory and later confirmed by observations. However, near a black hole, the effect is much more pronounced, and light can be trapped in an orbit around the black hole.