Warm ionized gas in the interstellar medium appears ________ when imaged in the optical region of the electromagnetic spectrum.
A) red
B) yellow
C) white
D) blue
E) dark

Question

Quizplus · Accepted Answer

Warm ionized gas in the interstellar medium emits light primarily in the red part of the spectrum due to the H-alpha emission line, which is a prominent feature of ionized hydrogen.

Warm Ionized Gas in the Interstellar Medium Appears ________ When