Twinkling of stars is due to atmospheric
(a) dispersion of light by water droplets
(b) refraction of light by different layers of varying refractive indices
(c) scattering of light by dust particles
(d) internal reflection of light by clouds
NCERT Class X
Science - Exemplar Problems
Chapter_The Human Eye and
the Colourful World
Answers
Answer: the answer is option (b)
Explanation:
The light from stars reaches the earth surface after being refracted from various layers of earth. Each layer of earth has different refractive index which is why from every layer, the light of stars get refracted. With every refraction we see the position of stars changing which causes the illusion of stars twinkling.
As the stars are located far away from the earth, their light takes many years to travel and reach the surface of earth. We are only able to see them at night but as we know that they are present during the day time also.
Answer:
Twinkling of stars is due to the refraction of light by different layers of varying refractive indices.
Explanation:
Actually, a star doesn’t twinkle like we see it from the ground. It emits light constantly but our atmosphere makes it look like twinkling. Our atmosphere has different layers with different refractive indices. When a light from the distance enters the earth atmosphere it starts to refract that light in every layer that enters. This is why we see the stars twinkling.