An ideal whitebody is the one that reflects all incident electromagnetic radiation whereas an ideal or perfect blackbody is able to absorb every incident electromagnetic radiation of all frequencies that come its way from from all angles. An ideal body is both perfect absorber and perfect emitter of radiation.
Another important characteristic of blackbody is that it emits radiation in all directions isotropically and its emissivity level is one ( ε = 1) which is far ahead of other real materials.
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