Question

Which of the following statements about dark matter and dark energy is/are true?

Choose one or more:
A. Both exceed the matter-energy equivalent of luminous matter.
B. Dark matter has only an attractive gravitational effect, while dark energy is repulsive.
C. While the nature of dark matter has been determined, the nature of dark energy has no

Answer 1

Answer:

A. Both exceed the matter-energy equivalent of luminous matter.

B. Dark matter has only an attractive gravitational effect, while dark energy is repulsive.

Explanation:

Dark matter and dark energy together constitute about ninety-five percent of the of total matter-energy equivalence in the universe. So, they exceed the matter-energy equivalent of luminous matter.

Dark energy is the repulsive force that is accelerating the expansion of the universe. Dark matter only has an attractive gravitational effect but does not interact with light of any kind.