Question

9. The rate of radiation united per unit surface area of a black body depends only
a) Pressure
b) Concentration
c) Temperature
d) Environmental condition​

Answer 1

Answer:

I think..Temperature

Answer 2

Option (c) The rate of radiation united per unit surface area of a black body depends only on Temperature

Explanation:

• The rate of radiations emitted by the body mainly depends on the type of surface, the temperature difference between the body and the surroundings.

• According to the Boltzmann's law "The total energy radiated per unit surface area for all unit time is proportional to the fourth power of black body's temperature T"

• The rate at which the black body emits radiation at a temperature is proportional to $T^{4}$.