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Stefan's law - class-XI
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The value of solar constant is approximately :
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A
$ 1388\ watt/m^{2}$
💡 Explanation:
The solar constant is defined as the amount of heat energy received per second per unit area by a perfect black body placed at the surface of the Earth with its surface being held perpendicular to the direction of the sun's rays.
The value of solar constant is $1388$($\dfrac{watt}{{meter}^{2}}$) or $2$($\dfrac{cal}{{cm}{\times} {min}}$)