Author Question: Collisions in the early Universe were rare. a. True b. False Indicate whether the statement is ... (Read 40 times)

nenivikky · **on:** Jul 27, 2018

Collisions in the early Universe were rare.

a. True
b. False
Indicate whether the statement is true or false

Question 2

Photons of light can be absorbed by an atom of an element ____.

a. if they match one of several possible wavelengths that are absorbed by that element
b. if they match one of several possible wavelengths that are absorbed by all elements
c. if they match the only particular wavelength that can be absorbed by that element
d. if they match the only particular wavelength that can be absorbed by all elements
e. no matter what wavelength they have