Question

-/1 POINTS SERPSE10 19.6.OP.026. MY NOTES ASK YOUR TEACHER At midday when a shopping center with a flat black roof is directly under the Sun, it receives 925 W of solar power per square meter of surface from the Sun. If this hot surface loses energy only by radiation back into the atmosphere, what is Submit Answer

Answer 1

Power emitted by a black body = sigma×T^4

Where sigma is Stephens constant having value 5.67× 10^-8

At equilibrium power received by the body = power emitted by the body

So'

sigma× T^4 = 925

T^4= (925/5.67×10^-8)^-4

And

T= 357.4 K