Question

question 1 (5 points)
listen
which of the following is a measure of the amount of light a star directly emits?
a) brightness
b) luminosity
c) wavelength
d) intensity
question 2 (5 points)
listen
how would a collapsing universe affect light emitted from clusters and superclusters?
a) light would acquire a blueshift.
b) light wouldnt be affected.
c) light would acquire a redshift.
d) light cant be measured from clusters and superclusters.

Explanation:

For Question 1, luminosity is the measure of the total amount of energy (including light) emitted by a star per - unit time. Brightness depends on distance, wavelength is related to the color of light, and intensity can have different meanings but is not the specific measure of light emitted by a star.
For Question 2, in a collapsing universe, objects are moving closer together. According to the Doppler effect, when an object is moving towards an observer, the light it emits is blueshifted.

Answer:

Question 1: B. Luminosity
Question 2: A. Light would acquire a blueshift.