Multiple Choice
Which of the following statements does NOT correctly describe the universe at the era of recombination?
A) The universe was about 380,000 years old.
B) Electrons and protons combined to form neutral hydrogen atoms.
C) The temperature of the universe was about 3 K.
D) The universe became transparent to radiation.
Correct Answer:
Verified
Correct Answer:
Verified
Q114: Who discovered the radiation left over from
Q115: The farther away a galaxy is,the more
Q116: What is "dark energy"?<br>A) The energy associated
Q117: What causes cosmological redshift of photons that
Q118: Recent results from very bright supernovae in
Q120: The question,"If the universe is expanding,what is
Q121: Einstein's general theory of relativity suggests that<br>A)
Q122: If inflation had not taken place,the observable
Q123: If space has a flat geometry,what will
Q124: Homogeneity means<br>A) viewing a blueshift in one