What is the dominant radiation from the intergalactic matter in rich clusters of galaxies?
A) ultraviolet light from electrons spiraling in magnetic fields
B) infrared radiation from dust
C) X-rays from very hot gas
D) 21-cm radio radiation from cool, neutral hydrogen gas

Question

Quizplus · Accepted Answer

The dominant radiation from the intergalactic matter in rich clusters of galaxies is X-rays, which are emitted by the very hot gas present in these clusters. This hot gas emits X-rays due to its extremely high temperature, which can reach tens of millions of degrees.

What Is the Dominant Radiation from the Intergalactic Matter in Rich