Question

The sun appears flattened at sunrise and sunset due to
A. scattering of sunlight
B. diffraction of sunlight
C. atmospheric refraction
D. atmospheric dispersion ​

Answer 1

Answer:

Apparent flattening of the sun's disc at sunrise and sunset is due to atmospheric refraction. The density and the refractive index of the atmosphere decreases with altitude, so the rays above and below the sun on the horizon are refracted by different degrees. This causes the apparent flattening of the sun.