Question

The twinkling of stars at night is due to

• A. Continuous change in the refractive index of air layers
• B. Continuous change in the actual position of the start
• C. Continuous change in the intensity of glow of the star
• D. None of the above

Answer 1

The correct option is A

Continuous change in the refractive index of air layers

The refractive index of air layers keeps on changing due to wind and convection currents thereby changing the apparent position of the stars and hence they appear to be twinkling.