question_answer

To an observer on the earth the stars appear to twinkle. This can be ascribed to [CPMT 1972, 74; AFMC 1995]

A)            The fact that stars do not emit light continuously

B)            Frequent absorption of star light by their own atmosphere

C)            Frequent absorption of star light by the earth's atmosphere

D)            The refractive index fluctuations in the earth's atmosphere