Why is a black hole the only object that has an event horizon?
A. Because of its mass.
B. Because of its density.
C. Because of both its mass and density.
D. (Neither its mass nor density matters.)
Answer:B
Why is a black hole the only object that has an event horizon?
A. Because of its mass. B. Because of its density. C. Because of both its mass and density. D. (Neither its mass nor density matters.)