The air in the atmosphere isn't all the same. Some areas are thicker, and some areas are thinner. Therefore when you go out at night and look at the stars, they appear to twinkle.1. The optical phenomena, twinkling of stars is due toa. Atmospheric reflectionb. Total reflectionc. Atmospheric refractiond. Total refraction2. The light coming from star when enters the earth atmosphere it experiences increase in density. So the ray of light benda. Away from the normalb. Towards the normal3. The refracting surfaces obeys the ______.a. Law of reflectionb. Law of refraction4. State true or false : The light of the star which travels through the many layers of the earth's atmosphere is bent many times and in random direction.a. TRUEb. FALSE5. The deviation of light ray from its path when it travels from one transparent medium to another transparent medium is calleda. Reflectionb. Refractionc. Dispersiond. Scattering