A Block of Ice

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Can radiate as well as absorb heat

Cannot radiate heat

Is an example for a white body

Is an example for a black body

answer is A.

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Detailed Solution

Any body can absorb heat. If it is at temperature above 0 K, then it radiates as well, as per Prevost theory of heat exchange.

Ice is not a black body because ice does not absorb 100% heat that falls on it. It reflects some part. Whereas a black body by definition absorbs all heat that falls on it.

At the same time, ice is not a white body because by definition a white body reflects all of heat that falls on it.

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