Why do scientists describe the theory of gravity as "incomplete"?
A)It does not incorporate a description of matter on a very small scale.
B)It does not explain why light bends near a dense object.
C)It does not agree with the expansion of the universe.
D)The gravitational waves it predicts have not been observed.
E)It does not explain the effects on time from a massive object.

Question

Quizplus · Accepted Answer

The theory of gravity, particularly Newton's law of universal gravitation and even Einstein's general theory of relativity, is considered incomplete because it does not incorporate quantum mechanics, which describes the behavior of matter on a very small scale. This gap has led to the search for a theory of quantum gravity.

Why Do Scientists Describe the Theory of Gravity as "Incomplete