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If a spacecraft equipped with a regularly flashing yellow light were to be observed as it moved ...

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If a spacecraft equipped with a regularly flashing yellow light were to be observed as it moved ...

If a spacecraft equipped with a regularly flashing yellow light were to be observed as it moved towards a black hole, what would be seen as it approached the event horizon (assuming that it remained intact and functional, which is questionable!)?

(a)   The flashing light would become more and more red and the flashing rate would appear to slow down until the light would eventually stop flashing at the event horizon.
(b)   The flashing light would become more and more blue and the flashing rate would speed up as the spacecraft accelerated into the black hole.
(c)   The color of the flashing light would remain yellow and the flashing rate would slow down but not stop. The light would disappear at the moment that the spacecraft passed through the event horizon.

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Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein

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