Dust in the ISM appears dark in ________ wavelengths and bright in ________ wavelengths.
A) visible; ultraviolet
B) infrared; radio
C) infrared; visible
D) radio; ultraviolet
E) visible; infrared

Question

Quizplus · Accepted Answer

Dust in the interstellar medium (ISM) blocks visible light, making it appear dark in visible wavelengths. However, it emits thermal radiation in the infrared, making it appear bright in infrared wavelengths.

Dust in the ISM Appears Dark in ________ Wavelengths and Bright