A quasar consumes 1 solar mass of material per year, converting 15 percent of it directly into energy. What is the quasar's luminosity, in solar units?
Quasars are created as a result of mas being swallowed by the supermassive black hole at the center of an active galactic nucleus. The luminosity of a quasar is the rate at which energy is emitted by the quasar. We are given the rate of
Luminosity is measured in watts,
So the luminosity of the quasar is;
For comparison, the luminosity of the Sun is;
Which is about 1 ten-billionth of the luminosity of the quasar.