Multiple choice

Due to atmospheric refraction of sunlight, the time from sunrise to sunset is lengthened by

  1. 2 minutes

  2. 4 minutes

  3. 20 minutes

  4. 40 minutes

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

Atmospheric refraction causes the sun to appear above the horizon when it is actually slightly below it, both at sunrise and sunset, adding approximately 2 minutes to each event.