The sun appears deep orange-red before it sets because


A) it is hotter at the end of the day

B) it contains more helium in the evening

C) it emits only orange-red light

D) its light has to traverse a thicker atmosphere therefore, other colours get scattered and do not reach us

Correct Answer:
D) its light has to traverse a thicker atmosphere therefore, other colours get scattered and do not reach us


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