[Solved] With reference to the Earth’s atmosphere, which one of the following statements is correct? The total amount of insolation received at the equator is roughly about 10 times of that received at the poles. Infrared rays constitute roughly two-thirds of insolation. Infrared waves are largely absorbed by water vapour that is concentrated in the lower atmosphere. Infrared waves are a part of visible spectrum of electromagnetic waves of solar radiation.

Q32. With reference to the Earth’s atmosphere, which one of the following statements is correct?

1. The total amount of insolation received at the equator is roughly about 10 times of that received at the poles.
2. Infrared rays constitute roughly two-thirds of insolation.
3. Infrared waves are largely absorbed by water vapour that is concentrated in the lower atmosphere.
4. Infrared waves are a part of visible spectrum of electromagnetic waves of solar radiation.

Answer: 3

• Water vapor is the most abundant greenhouse gas in the Earth’s atmosphere, and it has strong absorption properties in the infrared portion of the electromagnetic spectrum. As infrared radiation passes through the atmosphere, water vapor molecules can absorb and re-emit a significant portion of the longwave radiation – option