75) The ratio of the emissive power and absorptive power of all bodies is the same and is equal to the emissive power of a perfectly black body. This statement is known as

Krichoff′s law

Stefan′s law

Wien′ law

Planck′s law

Answer is:

Krichoff′s law

absolute temperature

Answer is:

absolute temperature (T)

Answer is:

p = 0, x = 0 and a = 1

p=l,T = 0anda = 0

p = 0, x = 1 and a = 0

x = 0, a + p = 1where a = absorptivity, p = reflectivity, x = transmissivity

Answer is:

p = 0, x = 0 and a = 1

p= l,T = 0anda = 0

p = 0, x = 1 and a = 0

x = 0, a + p = 0where a = absorptivity, p == reflectivity, X = transmissivity.

Answer is: