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UPSC Civil Services 35 SSC CGL / CHSL 0 Bank PO / Clerk 50 Railway RRB / NTPC 0 NEET UG 0 JEE Main 0 NDA / CDS 0

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Subject: All Current Affairs Environment & Ecology General Science Indian Economy Indian Geography Indian History Indian Polity & Constitution

Q.1 Easy UPSC Civil Services 2024 General Science

Which of the following best explains why the sky appears blue during the day but red or orange during sunset?

A The atmosphere contains more oxygen molecules during the day which scatter blue light

B Blue light has shorter wavelengths and is scattered more by air molecules during the day, while at sunset light travels through more atmosphere scattering blue light away

C The sun emits different colors of light at different times of the day

D Water vapor in the atmosphere absorbs red light during the day but reflects it during sunset

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PYQ Bank — UPSC Civil Services