Cosmology: The cosmic background radiation corresponds to a temperature of about
A) 1.4 K.
B) 2.7 K.
C) 3.8 K.
D) 4.9 K.
E) 5.5 K.

Question

Quizplus · Accepted Answer

The cosmic background radiation corresponds to a temperature of about 2.7 K. This is a relatively low temperature, resulting from the cooling of the universe since the Big Bang. It was first detected in 1964 by Arno Penzias and Robert Wilson, and has since been studied extensively as a means of understanding the early universe.

Cosmology: the Cosmic Background Radiation Corresponds to a Temperature of About