Mark the correct answer in the following questions.
What is the reason for the twinkling of stars?
A. Explosions occurring in stars from time to time
B. Absorption of light in the earth’s atmosphere
C. Motion of stars
D. Changing refractive index of the atmospheric gases
Answer:
Stars are point source of light very far from us. Light rays from stars passes through various layers of atmosphere whose refractive index goes on changing due to mobility of air, temperature and various gases present in air. So light suffer refraction when reaches to our eye and we see apparent position of star. Due to continuous change in refractive index of air sometimes star appear to us as bright or dim which appears to us as twinkling of star.
