Question

Harshit is trying to observe the star in sky, but he finds that position of star is changes continuously, it happens due to (1) a) reflection of light from star b) atmospheric refraction c) scattering of light d) dispersion of light​

Answer 1

Answer:

answer is b) atmospheric refraction

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Answer 2

Harshit is trying to observe the star in sky, but he finds that position of star is changing continuously, it happens due to b) atmospheric refraction.

• The light of the star refracts multiple times continuously before reaching the earth's surface.
• The refractive index of the atmosphere is changing continuously. The light is bent towards the normal. Hence, an apparent position of the star is seen from the earth's surface which is above its original position.
• Now, the physical conditions of the earth do not remain stationary. This is why the pathways of light coming from the star vary and ultimately, the apparent position of the star varies too.
• This is why Harshit finds that the position of the star is changing continuously.