The Doppler shifting of radiation from the early universe has resulted in today's universe being bathed in a sea of
A) cosmic rays.
B) X-rays.
C) radio waves.
D) infrared waves.

Question

Quizplus · Accepted Answer

The Doppler shifting of radiation from the early universe, specifically the cosmic microwave background radiation, has resulted in today's universe being bathed in a sea of radio waves. This is a remnant from the Big Bang and provides evidence for the expanding universe theory.

The Doppler Shifting of Radiation from the Early Universe Has