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

38. 

A perfect black body is one which

[A]. is black in colour
[B]. absorbs heat radiations of all wave lengths falling on it
[C]. reflects all the heat radiations
[D]. transmits the heat radiations

Answer: Option B

Explanation:

No answer description available for this question.

Rahul said: (Sep 9, 2015)  
B because emissivity of perfect black body is 1, that is it absorb all the radiation.

Vishal Kadam said: (Oct 9, 2018)  
Option B & C both are correct.

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