Is charcoal a blackbody?
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Even a body as black as a piece of coal radiates brightly at certain wavelengths (just not at any wavelengths that we can see). ... The cavity is then a "Black Body". The radiation emitted by a black body does not depend on any of the body's characteristics (color, material, shape, etc) other than its temperature.
Explanation:
A black body is a piece of material that radiates corresponding to its temperature — but most ordinary objects you think of as black, such as charcoal, also absorb and reflect light from their surroundings. ... So there you have it — a pretty good approximation of a black body.
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