Chemical Engineering - Heat Transfer - Discussion

Discussion Forum : Heat Transfer - Section 1 (Q.No. 14)
14.
For an ideal black body
absorptivity = 1
reflectivity = 1
emissivity = 0
transmissivity = 1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
4 comments Page 1 of 1.

Kriti said:   1 decade ago
According to kirchoff's law, an ideal black body is the one which absorbs all the radiation incident on it, hence its absorptivity is 1.
(2)

Engineera said:   9 years ago
Kirchoff's identity.

States on,
Absorptivity = Emissivity.
(1)

Prakash Dhanaraj said:   7 years ago
If absorptivity=1 means emmisivity=0 right,
Since absorptivity+emmisivity+transmittivity=1.
Please explain.

Ritik gupta said:   7 years ago
No @Prakhash Danraj.

Abroptivity means --> transmitivity , reflexectivity =0

Then, abroptivity+reflexectivity+transmitivity=1. Right?

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