Which of the following is not caused by atmospheric refraction of ligh – McqOptions

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1.	Which of the following is not caused by atmospheric refraction of light ?
A.	un appearing red at sunset
B.	winkling of stars at night
C.	un appearing higher in the sky than it actually is
D.	un becoming visible two or three minutes before actual sunrise
Answer» D. un becoming visible two or three minutes before actual sunrise

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