The emissive power of a black body at T = 300 K is `100W//m^(2)`. Consider a body B of area `A=10m^(2)`, coefficient of reflectivity r = 0.3, and absorptivity a = 0.2. If its temperature is 300K, then mark out the currect statement (s).

Options

A. The emissive power of B is `20W//m^(2)`
B. The emissive power of B is `200W//m^(2)`
C. The power emitted by B is 20 W
D. The power emitted by B is 180 W.

Answer

A