The cosmic background radiation is the:
A)electromagnetic remnants of the explosion in which the universe was born.
B)radio noise caused by high energy atomic nuclei known as cosmic rays, moving through magnetic fields in space.
C)result of the radioactive decay of heavy, unstable elements produced in supernova explosions.
D)faint glow along the ecliptic, caused by sunlight scattering from dust particles in the planetary system.

Question

Quizplus · Accepted Answer

The cosmic background radiation is the afterglow of the Big Bang, which occurred approximately 13.7 billion years ago. It is electromagnetic radiation left over from an early stage in the development of the universe when it was still very hot and dense. This radiation can be detected as microwave radiation and is a key piece of evidence for the Big Bang model of the universe's origins.

The Cosmic Background Radiation Is The