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Emissive and Absorptive Power

Three identic...

Question

Three identical spheres of different materials iron, gold and silver are at the same temperature. The one that radiates more energy is

A

Gold

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B

Silver

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C

Iron

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D

All radiate equally

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Solution

The correct option is C All radiate equally
Stefan's radiation law states that rate of radiation does not depends on temperature of material.
$P = σ T^{4}$

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