You are in a spaceship making measurements very close to a black hole. A partner's spaceship...

You are in a spaceship making measurements very close to a black hole. A partner's spaceship is orbiting the black hole at a much larger radius. Your partner sends messages to you using visible light pulses from a laser. When you receive the messages, do you expect to detect radio waves or gamma waves? Why?

The answer is gamma waves, but I don't understand.

Expert Solution

As we come closer to the black hole due to the very strong gravitational field of the black hole , the light coming towards the black hole will experience a decrease in the wavelength and increase in the frequency of the radiation. This is also known as blueshift which means the radiation will move towards the blue end of the electromagnetic spectrum which means higher frequency radiation. other way to see this phenomena is by observing that when any radiation falls into the strong gravitational field of the black hole it will gain energy and this increase in energy will increase the frequency of the radiation. Thus we will observe gamma waves closer to the black hole.

genius_generous answered 2 years ago

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