Hi guys, I’m back today with more about black holes. Today is more about the theory behind black holes.
Black holes have a phenomenal mass, and due to the universal gravitational equation, this means that it also has an incredible amount of gravitational force. This force is so much that even light can’t escape a black hole. This would mean that black holes are undetectable, wouldn’t it? Wrong. Stephen Hawking came up with a theory called Hawking radiation. This states that the black holes, which are opaque and non-reflective bodies held at a uniform temperature can emit thermal radiation, of which the temperature is inversely proportional to the black hole’s mass.
There are three parts to a black hole: the outer and inner event horizon and the singularity. The event horizon has a constant gravitational force throughout it and anything that goes beyond this point in the black hole can’t return. This is where light loses its ability to escape. Therefore, we cannot see past the event horizon. The singularity is the centre of the black hole and it is where the mass of the black hole is concentrated.
It is possible for black holes to decay. In the post before last, I explained antimatter. Relating to that, if a particle-antiparticle pair is created beyond the event horizon, it is possible to have one half drawn into the black hole singularity while the other gets ejected. This would reduce the event horizon of the black hole and cause it to decay.
Hope you have enjoyed reading my explanation of black hole theory. See you next week!
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