Question

iii)
is
If the emissive power of a certain body at
a certain temperature is 2000 W/m² and
emissive power of a perfect blackbody at
the same temperature is 1000 W/m2, what
is the coefficient of emission of the body?​

Answer 1

Answer:

Explanation:

Emissivity of body B, e=0.2 (Since e=a and a=(1−r−t)=0.2)

Emissive power of body B, E=(100)(0.2)=20W/m  

2

 

Power emitted =e.A=20×10=200Watts