Black holes can be characterized by their event horizons.

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The discussion focuses on the characterization of black holes through their event horizons. It specifically addresses the event horizon calculations for a black hole formed from the sun, which would be approximately 3 kilometers, and for a black hole with a mass of 109 M☉, which would yield an event horizon of about 29,000 kilometers. Additionally, the event horizon for the supermassive black hole at the center of our Galaxy, with a mass of 4 x 106 M☉, is calculated to be approximately 12 million kilometers.

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a) If the sun were compressed sufficiently enough so that it would turn into a
black hole, what would be the event horizon of such an object expressed in
km?
b) What is the event horizon for a black hole with a mass of 10
9
Msol?
c) What is the event horizon for the black hole with a mass of 4•10
6
Msol
in the
center of our Galaxy
 
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