Multiple Choice
As currently understood, what happens to the energy density of matter and the energy density of a cosmological constant as the universe expands?
A) Both the density of matter and the density of a cosmological constant increase as the universe expands.
B) The matter density decreases, but the density of the cosmological constant increases.
C) The matter density decreases, but the density of the cosmological constant remains constant.
D) Both the density of matter and the density of a cosmological constant decrease as the universe expands.
Correct Answer:
Verified
Correct Answer:
Verified
Q78: At the start of the Big Bang,
Q79: At the present time cosmologists believe the
Q80: What is the range of the electromagnetic
Q81: The cosmic microwave background radiation is not
Q82: Physicists are attempting to develop a Theory
Q84: Who developed the steady-state theory of the
Q85: What was the COBE satellite designed to
Q86: In cosmology, the constant that is intimately
Q87: The electromagnetic and weak nuclear forces are
Q88: The cosmic microwave background shows a pattern