Let there be four articles having colours blue, red, black and white. When they are heated together and allowed to cool, the article that cool earlier is :

Blue

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Red

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Black

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White

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Solution

The correct option is C Black
Black colour has highest emissivity.
Good absorbers have good emissive power so black will emit heat faster.
Correct answer should be black.

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Let there be four articles having colours blue, red, black and white. When they are heated together and allowed to cool, the article that cool earlier is :

The correct option is C BlackBlack colour has highest emissivity. Good absorbers have good emissive power so black will emit heat faster.Correct answer should be black.

The correct option is C Black
Black colour has highest emissivity.
Good absorbers have good emissive power so black will emit heat faster.
Correct answer should be black.