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Questions  

Three objects coloured black, gray and white can withstand hostile conditions up to 2800°C. These objects are thrown into a furnace where each of them attains a temperature of 2000°C. Which object will glow brightest ?

a
The white object
b
The black object
c
All glow with equal brightness
d
Gray object

detailed solution

Correct option is B

Bodies which absorb heat well will also emit heat because of this black body shines well or bright during cooling.

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