Multiple Choice
The cosmic microwave background peaks at a wavelength of about 1 mm, and the universe has a temperature of about 3 K. If the microwave background peaked at a wavelength of 10 micrometers, what would its temperature be? (Hint: see Cosmic Calculations 5.1 and 17.1)
A) about 300 K
B) about 0.03 K
C) about 0.3 K
D) about 30 K
Correct Answer:

Verified
Correct Answer:
Verified
Q29: What is Olbers' paradox and what is
Q39: Galaxies formed from tiny density perturbations that
Q41: Which of the following statements correctly summarizes
Q42: Which adjective does not necessarily describe a
Q43: How do we determine the conditions that
Q45: What is the Big Bang theory?<br>A)the idea
Q46: Approximately how long did the nucleosynthesis era
Q47: The four fundamental forces that operate in
Q48: Why can't current theories describe what happened
Q58: If inflation really occurred,then our observable universe