Multiple Choice
What is the cosmic microwave background radiation?
A) An almost-uniform background radiation from distant,unresolved,overlapping galaxies
B) Radiation left over from the Big Bang,after the universe expanded and cooled
C) A uniform background of radiation from electrons spiraling in weak intergalactic magnetic fields
D) Radiation from a very tenuous,ionized gas that fills the universe equally in all directions
Correct Answer:
Verified
Correct Answer:
Verified
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