Civil Services Examination · Question 62

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

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