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Heat Transfer Refrigeration and Air Conditioning - Engineering

Q1:

Which of the following statement is correct?

A A grey body is one which absorbs all radiations incident on it.

B At thermal equilibrium, the emissivity and absorptivity are same.

C The energy absorbed by a body to the total energy falling on it, is called emissivity.

D A perfect body is one which is black in colour.

ANS:B - At thermal equilibrium, the emissivity and absorptivity are same.

Explanation: No answer description is available.