Multiple choice

The atmospheric refraction of light causes twinkling of

  1. Planets

  2. Stars

  3. Satellites

  4. None of these

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stars are point sources of light, so their light is easily disrupted by atmospheric turbulence, causing twinkling. Planets appear as extended sources, so their light averages out and they do not twinkle.