If the red shifts of quasars arise from the expansion of the universe yet they have brighter magnitudes than galaxies with the same red shifts, the quasar must be

Question

Quizplus · Accepted Answer

Quasars are believed to be powered by supermassive black holes in the centers of galaxies, which emit huge amounts of energy in the form of radiation and jets of particles. This is what makes them so bright, despite their large distances and high redshifts. So, option E - emit a very large amount of energy per second is the best choice. The fact that quasars have brighter magnitudes than galaxies with the same red shifts suggests that they must emit a very large amount of energy per second. This supports the understanding that quasars are powered by supermassive black holes at the centers of galaxies, which accrete matter at very high rates and emit enormous amounts of energy.

If the Red Shifts of Quasars Arise from the Expansion