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Question

A black and a yellow body at room temperature are thrown into a furnace at a very high temperature. Seed the correct statement

A
Initially, both are equally bright and finally, yellow is brighter
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B
Initially black is brighter and finally, both are equally bright
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C
Initially yellow is brighter and finally, both are equally bright
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D
Initially yellow is brighter and black is brighter.
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Solution

The correct option is C Initially yellow is brighter and finally, both are equally bright

When the temperature of black body becomes equal to the temperature of furnace, it will radiate maximum energy, so it will be brightest. Initially it will absorb all radiations, so it will be darkest.

option (C) is correct.


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