Black holes can be characterized by their event horizons.

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The discussion focuses on calculating the event horizons of black holes based on their mass. For a black hole formed from the sun, the event horizon would be approximately 3 kilometers. A black hole with a mass of 10^9 solar masses would have an event horizon of about 2.95 billion kilometers. Additionally, the event horizon for the supermassive black hole at the center of the Milky Way, with a mass of 4 x 10^6 solar masses, is roughly 12 million kilometers. Understanding these measurements is crucial for grasping black hole characteristics.
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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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