Multiple Choice
Where did the cosmic microwave background (CMB) come from?
A) photons emitted from the first stars
B) photons released from hydrogen in our galaxy
C) light scattered by dust in our solar system
D) photons released when electrons and nuclei combined for the first time
Correct Answer:

Verified
Correct Answer:
Verified
Q3: What characteristic of the universe governs whether
Q4: What does the resolution of Olbers' paradox
Q6: The cosmological principle states that any observer
Q7: What do current observations indicate about the
Q9: The _ is that the universe is
Q10: How does the geometry of a gravity-dominated
Q11: Which of the following applies if the
Q12: Why is the cosmic microwave background (CMB)so
Q13: Under what conditions will space-time be flat?<br>A)if
Q59: Why is the primordial background radiation visible