Final answer:
The Cosmic Microwave Background (CMB) is a glow of microwave light representing some of the oldest light in the universe, initially emitted as visible light and then redshifted over time.
Explanation:
The Cosmic Microwave Background (CMB) is a glow of microwave light coming from every direction in the sky, representing some of the oldest light in the universe. Initially emitted as visible light due to its high temperature, the CMB has redshifted over time to appear as microwave light today. The CMB provides crucial insights into the early universe and supports the Big Bang theory.
Learn more about CMB, Astronomy, Light Spectrum here:
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