What is absorptive power ?

Define absorptive power, state its unit and dimension.

At a given temperature the ratio between emissive power and absorptive power is same for all bodies and is equal to the emissive power of black body This statement is called .

Define emissive power, coefficient of emission and absorptive power.

What is the power of lens?

What emissive power of perfectly black body ?

Explain what is resolving power?

Which are the physical processes involved in absorption of water?

The focal length of a convex lens is 20 cm.What is the power?

If at temperature T , the emissive power and absorption power of a body for wave length are e_(lambda) and a_(lambda) respectively, then-

What is meant by absorption of minerals?