The cosmic background radiation strongly suggests that
A)the energy radiated from the quasars is redshifted.
B)the universe has always been as it is today.
C)the universe evolved from a cold,rarified state.
D)the universe evolved from a hot,uniform state.
E)matter is continuously being created.

Question

Quizplus · Accepted Answer

The cosmic background radiation is uniform in all directions with a temperature of about 2.7K. This is best explained by the Big Bang Theory, which predicts that the universe began as a hot, dense and uniform state and has since been cooling and expanding. The cosmic background radiation is the leftover thermal radiation from the hot early universe, which has been stretched by the expanding universe to longer, cooler wavelengths. This strongly suggests that the universe evolved from a hot, uniform state.

The Cosmic Background Radiation Strongly Suggests That