I have a some questions that I need help on.
1. Which of the following are evidence that the universe has not been here forever? (There are three correct responses)
a. Olber's paradox
b. The expansion of the universe
c. The Cosmic Microwave Background
d. The age of Globular Clusters
Which of the following sets a minimum age for the universe? (There are three correct choices)
a. The expansion of the universe
b. Globular clusters
c. Olber's paradox
d. Galactic evolution and distribution
How can the Cosmic Microwave Background (CMB) be used to determine the temperature of the universe?
a. The CMB variability be measured to infer the universe's temperature.
b. Using the Doppler effect, one can find the temperature of the radiation.
c. Using the Wien's Law, one can use the peak emission wavelength to find the corresponding temperature.
d. The distribution of the CMB can be used to determine temperature.
4. Knowing the density of the universe is important since..
a. The density can tell us whether or not the universe is a steady state universe.
b. If the density is less than the critical density, the universe will be younger than was previously thought
c. If the density exceeds the critical density, the universe will be older than was previously thought.
d. It is related to how old the universe is.
1 answer