| Black
Holes -- basics |
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| • | Nothing can stop collapse after neutron pressure
fails |
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| • | Escape velocity from a surface at radius R: |
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| • | As R shrinks (but M is fixed), Vescape
gets larger and larger |
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| • | At some point VEscape=
c (speed of light) |
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| – | Happens at Schwarzschild radius: |
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| – | Not even light can escape from within this radius |
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