What is a perfect black body?
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A perfect black body is a theoretical object. It would have these properties:
- It would absorb all the radiation that falls on it.
- It would not reflect or transmit any radiation.
A perfect black body does not exist, it's a sort of calibration object that is taken as a reference to calculate the emission/absorption capability of other objects.
An object that is good at absorbing radiation is also a good emitter, so a perfect black body would be the best possible emitter of radiation.
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A body that is black is known as black body
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