The escape velocity at the event horizon of a black hole is 3×108 m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km?
A. 12.15 x 10-30 kg
B. 12.15 x 1030 kg
C. Infinity
D. Cannot be determined
Answer:B
The escape velocity at the event horizon of a black hole is 3×108 m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km?
A. 12.15 x 10-30 kg B. 12.15 x 1030 kg C. Infinity D. Cannot be determined