The planets twinkle at night due to atmospheric refraction of light
B
The stars appear higher in the sky than they actually are, due to scattering of light
C
The blue colour of sky is due to scattering of light
D
The rainbow is produced by the reflection of white sunlight by water drops in the atmosphere.
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Solution
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Correct option is C)
The blue colour of the sky is due to the scattering of light by small particles of the atmosphere (air molecules). When white light (from the sun) enters the earth's atmosphere, it gets scattered away due to the atmospheric particles. Since blue colour has the minimum wavelength, so blue colour scatters the most and thus the sky appears blue.
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