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Assertion : Good absorbers of radiation ...

Assertion : Good absorbers of radiation are weak emitters.
Reason : Ratoi of emissivity and absorptivity is constant for all substances at any temperature for same wavelength radiation.

A

Both are true and the reason is the correct explanation of the assertion.

B

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

C

Assertion is true, but the reason is false.

D

Both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
A
Assertion is correct according to Kirchhoff.s law.
And `a=e`, then `(a)/(e)=` constant.
Hence, reason is correct explanation of assertion.
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