Rajasthan BoardEnglish MediumSTD 7Social ScienceAir3 Marks
Question
Why does the amount of insolation decreases from equator towards poles?
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Answer
The earth is spherical in shape.
Therefore the regions close to the equator receive vertical rays of the sun that are concentrated so smaller area.
Due to the curvature of the earth the regions away form the equator receive slanting rays of the that are spread over a large area. Thus the heating provided by the same amount of sunlight is more in the equatorial region and much less in the polar region which at higher latitude.
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