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


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


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.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.