Q.

The approximate value of solar constant is


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a

1.4 kWm2

b

1.56 kWm2

c

3.4 kWm2

d

None of the above  

answer is A.

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Detailed Solution

The approximate value of solar constant is 1.4 kWm2
Each square meter of earth’s upper atmosphere receives about 1.4 kJ of solar energy second or 1.4  kWm2of power. This power received by the unit area of the earth’s atmosphere is called as solar constant. About  47% of the solar energy received by the earth reaches its surface. Remaining part of the solar radiation gets reflected back to space.
 
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