A Photon Escaping FROM a Large Mass Is Gravitationally Redshifted

question 124

Multiple Choice

A photon escaping FROM a large mass is gravitationally redshifted. What happens to the color of an object falling TOWARD a black hole (observed from far away) ?

• A) The color of the object will be blueshifted.
• B) The color of the object will remain unchanged.
• C) The color of the object will be redshifted because the photons reaching distant observers are escaping the vicinity of the black hole.
• D) As the object accelerates toward the black hole, moving faster and faster, the idea of color ceases to have meaning as the photons shift from visible violet to ultraviolet and then X-rays and gamma rays.

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