Which of the following astronomical objects emit radiation mostly at non-visible wavelengths?
A) dust clouds in space
B) hot gas surrounding black holes
C) cold interstellar gas clouds
D) All of these choices are correct.

Question

Quizplus · Accepted Answer

All of these objects emit radiation primarily at non-visible wavelengths. Dust clouds and cold interstellar gas clouds emit mostly in the infrared and radio wavelengths, while hot gas surrounding black holes emits in X-rays and other high-energy wavelengths.

Which of the Following Astronomical Objects Emit Radiation Mostly at Non-Visible