Question

define solar constant

Answer 1

Solar constant is the amount of radiant energy received per second per unit area by a perfect black body on the earth with its surface perpendicular to the direction of radiation fro sun in the absence of atmosphere.It is denoted by S.Its value = 1.388 * 10^3 W m ^-2.

Answer 2

amount of energy recieved by a black body in one second per unit area and perpendicular to the surface
dimensions =[e/m^2s^2]
SI unit  killowatt per square metre per second square
value approx =1.361