Question

1. what is the role of light in relation to black holes? *

a. light can escape black holes
b. light is attracted to black holes
c. light cannot escape black holes
d. light creates black holes

1. what is required for a spaceship to successfully escape a black hole? *

a. increased speed and distance
b. decreased mass
c. special fuel
d. anti - gravity technology

Explanation:

For question 7:

• A black hole has an extremely strong gravitational pull.
• According to the theory of general relativity, within the event horizon of a black hole, the gravitational pull is so strong that even light (which has no rest mass but has energy - momentum) cannot escape. So option C is correct.

For question 8:

• The escape from a gravitational field (including that of a black hole) is related to speed and distance. The escape velocity formula \(v = \sqrt{\frac{2GM}{r}}\) (where \(G\) is the gravitational constant, \(M\) is the mass of the object creating the gravitational field, and \(r\) is the distance from the center of that object) shows that to escape a gravitational field (in the context of classical mechanics, and this concept is extended in general relativity for black holes), increased speed (to overcome the gravitational pull) and increased distance (as the gravitational force \(F=\frac{GMm}{r^{2}}\) decreases with increasing \(r\)) are relevant. So option A is correct.

Answer:

1. C. Light cannot escape black holes
2. A. Increased speed and distance