The setting sun appears red. What can you conclude?
A) The sun's surface temperature has cooled somewhat at the end of the day.
B) Only the longest waves of visible light are striking your eye.
C) The next day's weather will be stormy.
D) You will not be able to see the moon that night.

Question

Quizplus · Accepted Answer

The reason the setting sun appears red is due to the dispersion of light as it travels through a greater amount of Earth's atmosphere when the sun is close to the horizon. This results in the shorter blue and green wavelengths being scattered more, leaving only the longer red wavelengths to reach our eyes.

The Setting Sun Appears Red