When the atmosphere is not quite clear, one may sometimes see colored circles concentric with the Sun or the Moon.These are generally not more than a few diameters of the Sun or Moon and invariably the innermost ring is blue.The explanation for these phenomena involves:
A)reflection
B)refraction
C)interference
D)diffraction
E)Doppler effect

Question

Quizplus · Accepted Answer

These colored circles, known as coronas, are caused by the diffraction of light around small water droplets or ice crystals in the atmosphere.

When the Atmosphere Is Not Quite Clear, One May Sometimes