Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 2 (Q.No. 18)
18.
The emissivity for a black body is
Discussion:
12 comments Page 1 of 2.
Munavvar said:
2 years ago
The emissivity of the black body is one. Not zero.
Birendra kumar verma said:
4 years ago
For black body Absorptivity is 1 and Emissivity will be 0 only.
Ashish mali said:
6 years ago
Emissivity is the ratio of emissive power of any body to emissive power of the black body.
So, for the black body it is 1.
So, for the black body it is 1.
Kukku said:
6 years ago
Why, please explain.
Raju said:
7 years ago
For black body it is 1.
For white body it is 0.
For white body it is 0.
Ayo said:
7 years ago
By definition, a black body in thermal equilibrium has an emissivity of ε = 1.0.
Dhiraj said:
8 years ago
I am sure. It should be zero.
Raghuprasad said:
8 years ago
It should be zero.
Baby said:
8 years ago
Emissivity of black body is one.
Akash said:
9 years ago
It is 0. I'm sure with this answer.
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