Which Statement About the Cosmic Microwave Background Is Not True

question 15

Multiple Choice

Which statement about the cosmic microwave background is not true?

• A) It is the result of a mixture of radiation from many independent sources, such as stars and galaxies.
• B) Its spectrum corresponds to a temperature of just under 3 degrees above absolute zero.
• C) With the exception of very small variations, it appears essentially the same in all directions in which we look into space.
• D) It is thought to be radiation that began its journey to our telescopes when the universe was about 380,000 years old.

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