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

Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 4 (Q.No. 49)
49.
Emissivity of a body will be equal to its absorptivity at all temperatures.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

Paul said:   7 years ago
It is Only possible at an absolute temperature and at thermal equilibrium.

Waseem said:   8 years ago
Only When the body is diffuse gray according to Kirchoff's law.

Subhasis Roy said:   8 years ago
It is Only when in a thermal equilibrium condition.
(1)

AMAL said:   10 years ago
Only thermal equilibrium.
(1)

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