Studying the pattern of temperature variations in the early universe (see Figure 25-13 of Universe, 11th ed.) tells us something about the sound waves existing at that time. This, in turn, has given us information about all of the following EXCEPT the:

A)average densities of matter and dark energy.
B)average value of the Hubble constant at that time.
C)age of the universe at that time.
D)nature of dark energy.

Question

Studying the pattern of temperature variations in the early universe (see Figure 25-13 of Universe, 11th ed.) tells us something about the sound waves existing at that time. This, in turn, has given us information about all of the following EXCEPT the:
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 ​
A)average densities of matter and dark energy. 
B)average value of the Hubble constant at that time. 
C)age of the universe at that time. 
D)nature of dark energy.

Quizplus · Accepted Answer

Studying the temperature variations in the early universe can tell us about the sound waves and their properties, which can then be used to determine the average densities of matter and dark energy, the value of the Hubble constant, and the age of the universe at that time. However, it does not provide direct information about the nature of dark energy, which is still not well understood.

Studying the Pattern of Temperature Variations in the Early Universe