Why does a cavity with a small hole behave as black body?
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A widely used model of a black surface is a small hole in a cavity with walls that are opaque to radiation. Radiation incident on the hole will pass into the cavity , and is very unlikely to be re-emitted if the cavity is large.
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A widely used model of a black surface is a small hole in a cavity with walls that are opaque to radiation. Radiation incident on the hole will pass into the cavity , and is very unlikely to be re-emitted if the cavity is large.
HOPE IT HELPS!!!!
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