The CMB Is a Snapshot of the Radiation in the Universe

question 64

Multiple Choice

The CMB is a snapshot of the radiation in the universe at a redshift of z ≈ 1,000 when the universe was:

• A)1,000 times smaller than it is today
• B)10 times smaller than it is today
• C)two times smaller than it is today
• D)the same size as it is today
• E)10 times larger than it is today

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