In the H-R diagram, roughly 80 percent of all stars are
a. in the giant region.
b. in the supergiant region.
c. among the B stars.
d. among the G stars.
e. on the main sequence.
Question 2
Photons of blue light
a. have a greater energy than photons of red light.
b. have a greater energy than photons of ultraviolet light.
c. have a lower frequency than photons of red light.
d. have a longer wavelength than photons of red light.
e. travel at a greater speed than photons of red light.