Choose the best answer to complete the following sentence. Dark energy and the c

Question

Choose the best answer to complete the following sentence. Dark energy and the cosmological constant are synonymous because

a) as the universe expands the amount of dark energy comes closer and closer to the constant critical density

b) as the universe expands there is the same amount of dark energy as there was at the beginning of the universe. The amount of dark energy is constant

c) as the universe expands there is more and more dark energy, proportional to the volume of space. Hence, there is a constant amount of energy per unit volume

Explanation / Answer

C) As the universe expands, dark energy increases but energy per unit volume remains constant which is actually cosmological constant.

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