MDCAT Physics MCQ #322

Why do emission nebulae show bright colors against dark backgrounds?

MDCAT Physics MCQ #322

  1. Question 1

    Q1. Why do emission nebulae show bright colors against dark backgrounds?

    • A) Ionized gas emits photons at specific wavelengths.
    • B) Dust reflects light from surrounding stars.
    • C) High-pressure gas produces continuous emission.
    • D) Thermal radiation dominates in nebulae.

    Answer: Ionized gas emits photons at specific wavelengths.

    Explanation: Ionized atoms emit line spectra at visible wavelengths. Option B describes reflection nebulae instead.