The Cosmic Microwave Background Radiation Was Emitted When the Universe

question 83

Multiple Choice

The cosmic microwave background radiation was emitted when the universe had a size about 1/1000 of today's value. What was the temperature of the microwave background radiation when it was emitted?

• A) 30 K
• B) 300 K
• C) 3000 K
• D) 30,000 K
• E) 300,000 K

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