All Questions
3
questions
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Plausibillity of using a black hole as a telescope?
I recently learned about the proposed FOCAL telescope, which would use the Sun's gravity as a lens to observe exoplanets (or whatever it's aimed at) with incredibly high resolution. Obviously, the Sun ...
1
vote
1
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Black holes in a denser media
In Crown Glass, the speed of light is 1.52 times the speed of light in vacuum. Consider the following hypothetical situation:
Hypothetical Situation
If a black hole is surrounded by a giant crown ...
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4
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2
answers
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Seeing one's back on the event horizon
If we would hypothetically be exactly on the event horizon, we should see our own back, because of the circular motion of photons on the event horizon, right?
But what would be the image size, or $-$ ...
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