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The radiant energy from the Sun incident...

The radiant energy from the Sun incident normally at the surface of earth is `20kcal//m^(2)` min What would have been the radiant energy incident normally on the earth if the sun had a temperature twice of the present one ? .

A

`160 kcal//m^(2)` min

B

`40 kcal//m^(2)` min

C

`320 kcal//m^(2)` min

D

`80 kcal//m^(2)` min

Text Solution

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The correct Answer is:
c
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