A source of radio waves from space is
A) cosmic rays.
B) dark matter.
C) fast electrons that move through magnetic fields.
D) white dwarfs.

Question

Quizplus · Accepted Answer

Fast electrons moving through magnetic fields can emit synchrotron radiation, which is a type of radio wave. This is a common phenomenon in space, such as in supernova remnants and pulsars. Cosmic rays and dark matter are not sources of radio waves, and while white dwarfs can emit radiation, it is typically not in the form of radio waves.

A Source of Radio Waves from Space Is