Linked Questions
44 questions linked to/from Why is a black hole black?
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Can light escape a black hole? [duplicate]
I heard that a black hole is not black because it's escape velocity is greater than or equals to the speed of light. But instead it is black because the light that gets emitted from a black hole gets ...
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What is the reasoning behind the idea that light cannot escape from a black hole? [duplicate]
According to the definition, light cannot escape from a black hole.
How did scientists deduce that light cannot escape from a black hole?
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How does black hole suck light? [duplicate]
I was asked the same by my friend. I said that gravitational attraction also occurs for high energy particles .
My friend said photon is not so very high energy particle which I found on net. He ...
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Why can't we see whats inside black holes? [duplicate]
May be it's a dumb question. But I like to know why can't we see the matter or objects that are inside a black hole? Because I read that black holes suck huge objects like planets, stars or bla bla ...
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Why doesn’t light escape a black hole? [duplicate]
When an object is squeezed to its Schwarzschild radius it becomes a black hole (made by density) and its mass does not change (its gravity doesn’t change), but if its mass doesn’t change (its gravity ...
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Can light be launched outwards from an event horizon? [duplicate]
There's something which I don't quite get about black holes and event horizons (feel free to tell me if I got something completely backwards at any step along the way):
Say we have a singularity and ...
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Why Black Hole are black? [duplicate]
I found it difficult to understand what behind the story of black hole, I have did some research but have no sense what it meant. This question is really base on my curiosity, I want to learn and ...
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Why exactly is it that light cannot escape a black hole? [duplicate]
I understand that the gravity has to have a pull greater than the speed of light, but I thought that when gravity pulls light it doesn't accelerate it only blue-shifts it. So then why does gravity ...
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Why are black holes black? [duplicate]
If heard two explanations for this. One explanation is that the gravity is so strong that space is being stretched inward faster than the speed of light and thus no photons could possibly escape. The ...
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If the speed of light is constant, why can't it escape a black hole?
When speed is the path traveled in a given time and the path is constant, as it is for $c$, why can't light escape a black hole?
It may take a long time to happen but shouldn't there be some light ...
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How does light behave within a black hole's event horizon?
If the event horizon of a black hole is the distance from the center from within which light cannot escape, imagine a person with a flashlight falls into the black hole.
He points his flashlight in a ...
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Can we have a black hole without a singularity?
Assuming we have a sufficiently small and massive object such that it's escape velocity is greater than the speed of light, isn't this a black hole? It has an event horizon that light cannot escape, ...
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Fighting a black hole: Could a strong spherical shell inside an event horizon resist falling in to the singularity?
As a thought experiment imagine an incredibly strong spherical shell with a diameter a bit smaller than the event horizon of a particular large black hole. The shell is split into two hemispheres, ...
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If you shoot a light beam behind the event horizon of a black hole, what happens to the light?
I have a couple of questions about light here, and sorry of they are silly..
So since anything that goes beyond the event horizon can't go out, so what if a light beam was pointed somewhere behind ...
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Why is matter drawn into a black hole not condensed into a single point within the singularity?
When we speak of black holes and their associated singularity, why is matter drawn into a black hole not condensed into a single point within the singularity?
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