Which of the following statements about the cosmic background radiation is not true?
A)It has a temperature of about 3 degrees K above absolute zero.
B)It is the result of a mixture of radiation from many independent sources,such as stars and galaxies.
C)It had a much higher temperature in the past.
D)It was discovered by Penzias and Wilson in the early 1960s.
E)It appears essentially the same in all directions (it is isotropic).

Question

Quizplus · Accepted Answer

The cosmic background radiation is not the result of a mixture of radiation from many independent sources. Instead, it is the afterglow of the Big Bang, which has been redshifted and cooled down over time.

Which of the Following Statements About the Cosmic Background Radiation