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Emissive and Absorptive Power

Assertion : G...

Question

Assertion : Good Reflectors are poor emitters of Thermal Radiation
Reason : The ratio of the emissive power and absorptive power is constant for all substances at any given temperature and radiation of same wavelength

A

Assertion and Reason are correct and reason is the correct explanation for assertion

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B

Assertion and Reason are correct and reason is not the correct explanation for assertion

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C

Assertion is true but reason is false

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D

Assertion is false but reason is true

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Solution

The correct option is A Assertion and Reason are correct and reason is the correct explanation for assertion
Good reflectors are bad emitters of radiation.
Good reflectors, are called so because they absorb very little radiation and reflect the rest.
The ratio of absorptive and emissive power is constant for a given temperature and wavelength, so a bad absorber of radiation is also a bad emitter.
Hence the assertion and reason are true and the reason is the correct explanation.

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