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Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion

Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 2 (Q.No. 39)
Heat Transfer, Refrigeration and Air Conditioning
39.
Which of the following statement is correct?
A grey body is one which absorbs all radiations incident on it.
At thermal equilibrium, the emissivity and absorptivity are same.
The energy absorbed by a body to the total energy falling on it, is called emissivity.
A perfect body is one which is black in colour.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.
Aman kumar said:   4 years ago
Why not c is true? Explain please.
KSRTC said:   5 years ago
Right, thanks @Garvit.
Vivek said:   9 years ago
Right @Garvit.
Garvit said:   10 years ago
According to Kirchhoff law emissivity equal to absorptivity.
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