Three objects coloured black, gray and w...

Three objects coloured black, gray and white can withstand hostile conditions upto `2800^(@)C`. These objects are thrown into a furance where each of them attains a temperature of `2000^(@)C`. Which object will glow brightest?

White object

Black object

All glow with equal brightness

Grey object

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The correct Answer is:

An ideal balck body absorbs all the radiations incident upon it and has emissivity equal to 1. if a black body and the black body will radiate the maximum power.Hence , the black object at a temperature of `2000^(@)C` will have the brightest glow.

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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-KINETIC THEORY OF GASES ANDRADIATION-Exercise 2

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