Amount of insolation received by the earth depends upon:

  1. Solar Constant
  2. Position of earth with respect to Sun
  3. Altitude of the Sun

  Select the correct option from codes given below:

Answer: [D] 1, 2 & 3

The intensity of the solar radiation received on a unit area of horizontal surface at the outer limit of the atmosphere is called the solar constant. The average value of solar constant is about 2 gram calories per square centimetre per minute. Amount of Insolation also depends upon earth’s position with respect to sun i.e aphelion and perihelion. It also depends upon sun’s altitude.

This question is a part of GKToday's Integrated IAS General Studies Module