General Knowledge - Physics - Discussion

Discussion Forum : Physics - Section 1 (Q.No. 33)
33.
Stars twinkle because
the intensity of light emitted by them changes with time
the distance of the stars from the earth changes with time
the refractive index of the different layers of the earth's atmosphere changes continuously, consequently the position of the image of a start changes with time
the light from the star is scattered by the dust particles and air molecules in the earth's atmosphere
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
13 comments Page 1 of 2.

Yash said:   7 years ago
It is refraction @Deepak.

Rajesh said:   7 years ago
Thanks for all the given information.

Deepak said:   7 years ago
@Rupesh.

I think it's scattering of light.

Purnima said:   8 years ago
It is Due to the refraction of light by the atmosphere.

Rupesh said:   9 years ago
Why do stars appear to be twinkling in the sky?

A. Scattering of light
B. Emission of light
C. Absorption of light
D. Reflection of light

Mond shadab said:   9 years ago
It happens just because of atmospheric refraction. When the light from the stars come through the different atmospheric layers when it undergoes rare medium and denser medium and light Bends. And hence we find the position of the image of stars in our eyes at an indefinite position then it actually is.

Udayan said:   9 years ago
It is because the light reflected from stars which is directly transferred to earth's surface. The layer of air present over the earth refracts the light reflected by stars so they appear twinkling.

Elakiya jyothi said:   9 years ago
It is because of the refraction.

Sivaranjani said:   9 years ago
@Pavneet.

The Sun is nearer to earth and we receive a greater amount of light therefore, minor variations in the intensity are not noticeable.

Pavneet said:   10 years ago
Can anyone tell me? If star twinkles because of different refractive index of earth.

Why doesn't it happens with sun?


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