Q.

Assertion : A body that is a good radiator is also a good absorber of radiation at a given wavelength.
Reason : According to Kirchoff’s law the absorptivity of a body is equal to its emissivity at a given wavelength

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a

Both Assertion and Reason are correct and Reason is correct explanation of Assertion

b

Both Assertion and Reason are correct and Reason is not correct explanation of Assertion

c

Assertion is true Reason false

d

Assertion and Reason are false

answer is A.

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Assertion : A body that is a good radiator is also a good absorber of radiation at a given wavelength.Reason : According to Kirchoff’s law the absorptivity of a body is equal to its emissivity at a given wavelength