On a clear day, the sky appears to be more blue toward the zenith (overhead) than it does toward the horizon. This occurs because
A)the atmosphere is denser higher up than it is at the Earth's surface.
B)the temperature of the upper atmosphere is higher than it is at the Earth's surface.
C)the sunlight travels over a longer path at the horizon, resulting in more scattering.
D)none of the given answers

Question

Quizplus · Accepted Answer

The sunlight travels a longer path through the atmosphere at the horizon, causing more scattering of shorter wavelengths and leaving longer wavelengths, making the sky appear less blue.

On a Clear Day, the Sky Appears to Be More