Author Question: If you compare two stars, a. the one with the larger radius will always have the greater ... (Read 28 times)

waynest · **on:** Jul 27, 2018

If you compare two stars,

a. the one with the larger radius will always have the greater luminosity.
b. the one with the higher surface temperature will always have the greater luminosity.
c. the one with the smaller absolute magnitude will always have the greater luminosity.
d. the one with the larger surface area has the greater energy flux from its surface.

Question 2

Which has the larger light-gathering power?

a. a telescope of 5 cm diameter and focal length of 50 cm
b. a telescope of 6 cm diameter and focal length of 100 cm
c. a telescope of 2 cm diameter and focal length of 100 cm
d. a telescope of 3 cm diameter and focal length of 75 cm
e. both b and c since they have the same focal length.