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Question
Which of the following is not caused by the atmospheric refraction of light?
(a) twinkling of stars at night
(b) sun appearing higher in the sky than it actually is
(c) sun becoming visible two minutes before actual sunrise
(d) sun appearing red at sunset
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Solution
sun appearing red at sunset
The sun appears red at sunset not because of the atmospheric refraction of light but because of the scattering effect of light.
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