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Assertion : Coefficient of absorption o...

Assertion : Coefficient of absorption of radiation of an ideal black body is `1`.
Reason : An ideal black body emits radiation of all wavelengths.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If the assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
We know that for ideal black body reflectance `(r) =0` transmittance `(t)=0` absorptance `(a)=1`. It is clear that when heated the black body will radiated all energy. Which is absorbed by it.
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