differentiate between emitters and absobers
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Objects that are good emitters are also good absorbers (Kirchhoff's radiation law). A blackened surface is an excellent emitter as well as an excellent absorber. If the same surface is silvered, it becomes a poor emitter and a poor absorber. A blackbody is one that absorbs all the radiant energy that falls on it.
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Emitters are any man made or naturally occurring entities that can give out certain radiation of varying or constant frequencies . eg sun emits heat radiation
Absorbers let the suitable radiation sink in them .eg heat emitted by sun is observed by water bodies.
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