When the Atmosphere Is Not Quite Clear, One May Sometimes

question 35

Multiple Choice

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 this phenomena involves:

• A) reflection
• B) refraction
• C) interference
• D) diffraction
• E) Doppler effect