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Question
Which of the following phenomena contributes significantly to the reddish appearance of the sun at sunrise or sunset?
Options
Dispersion of light
Scattering of light
Total internal reflection of light
Reflection of light from the earth
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Solution
Scattering of light
Explanation -
Red colour scatters the least and hence travels the farthest. During sunset or sunrise, light has to travel a longer distance to reach us.
Hence, only red light reaches us and the sky appears reddish.
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