The cosmic microwave background is
A) caused by the world's microwave ovens.
B) the now- cooled X-ray radiation emitted by very distant supernova explosions.
C) the faint glow from the most distant galaxies.
D) the faint radiation that comes from the hydrogen atoms that fill the universe.
E) the now- cooled radiation that was released by the big bang.
Correct Answer:
Verified
Q27: The evidence favors a universe whose overall
Q28: Since accelerations are equivalent to gravity, a
Q29: Dark energy
A) has never been directly observed
Q30: According to the theory of cosmic inflation,
Q31: In the equivalence principle,
A) all forces are
Q33: One piece of evidence supporting the theory
Q34: Dark energy is made of
A) invisible electromagnetic
Q35: According to the principle of equivalence, acceleration
Q36: In the general theory of relativity, we
Q37: Cosmic inflation caused the universe to expand,
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