Which of the following statement is correct about heat transfer?
Right Answer is:
At thermal equilibrium, the emissivity and absorptivity are the same
Kirchhoff’s law of thermal radiation states that the emissivity of a body is equal to its absorptivity when the body remains in thermal equilibrium with its surrounding.
Note:- A blackbody allows all incident radiation to pass into it (no reflected energy) and internally absorbs all the incident radiation (no energy transmitted through the body).