Home PYQs UPPSC UPPSC MCQs Prelims 2022 (GS Paper I)

Question

The earth atmosphere is mainly heated by which one of the following ?

  1. Long wave terrestrial radiation
  2. Scattered solar radiation
  3. Reflected solar radiation
  4. Short wave solar radiation

Answer:

Option A: Long wave terrestrial radiation

Detailed Solution:

The correct answer is “Long wave terrestrial radiation”.

The Earth's surface absorbs solar energy and re-emits it as long-wave infrared radiation (terrestrial radiation). This is a key process in warming the atmosphere, as this radiation is absorbed by greenhouse gases in the atmosphere, leading to the greenhouse effect.