Apparent Brightness Problem?

Question

You have a telescope that can detect all objects brighter than a minimum flux (or apparent brightness) level F. If you are observing quasars which have luminosity L which is 1500 times larger than the luminosity of a normal (non-active) galaxy, out to how much greater distance can you detect the quasars as compared to the galaxies?

Answer 1

Hi. 1500 times farther.