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A perfect blackbody absorbs all radiation incident on it and

It emits electromagnetic radiation in the form of thermal radiation from its surface.

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A perfect blackbody is a perfect emitter and perfect absorber.

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What is the absorptive power of a perfect black body?

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A perfect black body is an object that absorbs all incoming radiation and emits the maximum amount of thermal radiation for its temperature. It serves as a theoretical standard for understanding thermal radiation. The concept of a perfect black body helps scientists study and compare the thermal radiation emitted by real objects.


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If it is capable of emitting and absorbing radiations having wavelength right from 0 to infinite, then it is declared as perfect black body. Sun is a black body. Now it is in the emitting phase.


Why does some object appear black?

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Black is the color which absorbs or radiates all frequencies equally. The perfect black body is only a theoretical object; in the real world there is always some limit to the frequency range. However, a hole in a cavity radiator comes close to being a black body.


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