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What is the material that absorbs most incident light?

The visible light spectrum corresponds to the range of wavelength from
0.38 to 0.76 microns of the electromagnetic radiation spectrum.
Solid materials that have an absorptivity, α, close to 1 (a material with
α = 1 is called a black body, and absorbs all the thermal radiation that
hits him including visible light, a hypothetical concept) absorb most of the
incident light radiation. Materials that have a mat (lusterless) black color
have α close to 1.
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