Question

Twinkling of stars and non-twinkling of planets is accounted for by
(a) scattering of light
(b) dispersion of light
(c) atmospheric refraction
(d) none of these​

Answer 1

Answer:

Ans C . twinkling of stars due to atmospheric refraction of starlight .

Explanation:

The starlight , on entering the earth's atmosphere, undergo refraction continuously before it reaches to earth .

The planet are at lesser distance from us as a compared to stars .

Answer 2

Twinkling of stars and non-twinkling of planets is accounted for by atmospheric refraction.

Let's see how !

• In the atmosphere, there are several layers of air which have different refractive index.

• Now, rays originating from the star undergo several refraction as they $pa ss$ through each of the interfaces and finally reach the eye of the observer.

• The atmospheric conditions may suddenly vary resulting in change in refractive index. This leads to change in path of light ray and for a moment the rays don't fall on the observer's eye.

• Again, in the next moment, the rays fall on the eye.

• This produces a TWINKLING EFFECT OF STARS.

$\star$ Hope It Helps.