Question

18) The radiant energy from the Sun, incident
normally at the surface of earth, is 20kcal/m² -
min. What would have been the radiant energy
incident normally on the earth, if the sun had a
temperature twice of the present one?
1) 40 kcal/(m- min)
2) 80kcal/(m²-min)
3) 160 kCal/(m²-min)
4) 320 Kcal/(m²-min)
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Answer 1

Answer:

answer will be d

Explanation:

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