Question

the value of solar constant in Earth's surface is....?

Answer 1

The average amount ofsolar radiation received by the Earth'satmosphere, per unit area, when theEarth is at its mean distance from the Sun. It is equal to 1370 watts per square meter.
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Answer 2

"The solar constant"The average rate at which radiant energy received from the sun by the earth equal to 1.94 small calories per minute per square centimeter of area perpendicular to the suns rays, measured at a point outsidethe earths atmosphere when the earth is at itsmean distance from the sun.