Multiple Choice
The cosmic microwave background is found to be extremely uniform throughout space,with only very small fluctuations in intensity.The event that produced this remarkable smoothness in the early universe was:
A) the occurrence of the Big Bang everywhere in space at the same time.
B) the start of the production of matter in the universe, which smoothed out the irregularities in space.
C) an exemplar of Heisenberg's uncertainty principle that prevented the concentration of radiant energy in localized volumes of space.
D) a sudden but brief period of rapid expansion (cosmic inflation) of the universe during the general expansion of the early universe.
Correct Answer:
Verified
Correct Answer:
Verified
Q54: How many fundamental forces are known in
Q125: At what time did the universe cool
Q126: If the early universe had been perfectly
Q127: In a state of thermal equilibrium,particles and
Q128: At an age of 500,000 years,the temperature
Q129: Suppose the expansion of the universe has
Q131: Grand unified theories,or GUTs,predict that at temperatures
Q132: In the universe,we can consider four different
Q134: Why did Newton view the universe as
Q135: Why is the universe expanding?<br>A) The energy