Multiple Choice
Which statement does NOT correctly describe the universe at the era of recombination?
A) The temperature of the universe was about 3 K.
B) The universe was about 500,000 years old.
C) The universe became transparent to radiation.
D) Electrons and protons combined to form neutral hydrogen atoms.
Correct Answer:
Verified
Correct Answer:
Verified
Q12: Opposite sides of the universe have the
Q37: In relation to the universe, what does
Q106: For how long did continuous star formation
Q107: What is the range of the strong
Q108: What designation do we give to the
Q109: Within which time frame from the initial
Q110: Why does the observable universe have an
Q112: Which cosmological problem is "dark energy" believed
Q115: If the cosmological constant exists,what physical effect
Q116: When Hubble first calculated the recessional speeds