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Suppose 100 units of radiation is coming from the sun. 35 units gets reflected back to space. 14 units is absorbed by atmosphere. 51 units reaches the earth’s surface. What is the amount of insolation in the above scenario ?

49 units
51 units
65 units
86 units
Explanation:
The purpose of this question was to make you relearn that – only that part of the sun’s radiation which reaches the earth’s surface is called insolation. While it may look easy to remember it now, students often gets confused in these basic concepts when they read more advanced things.
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