Question : Which of the following is not caused by atmospheric refraction of light?
Option 1: The Sun appears red at sunset.
Option 2: Twinkling of stars at night
Option 3: Sun appears higher in the sky than it is
Option 4: Sun becomes visible two or three minutes before actual sunrise.
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Correct Answer: The Sun appears red at sunset.
Solution : The correct answer is the Sun appearing red at sunset .
The Sun appears red at sunset because of the scattering phenomenon, and all the other options are examples of atmospheric refraction. The refraction of light induced by the earth's atmosphere is known as atmospheric refraction and occurs because different layers of the atmosphere vary in densities.
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