Infrared Light
Electromagnetic waves between the upper (low-energy) end of the visible light range and the microwave region of the electromagnetic spectrum. The spectral region 750 nm - 1000 nm, bordering the visible light range, is of relevance to document inspection: IR light is used in special equipment, e.g. to detect data alteration.
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Electromagnetic waves between the upper (low-energy) end of the visible light range and the microwave region of the electromagnetic spectrum. The spectral region 750 nm - 1000 nm, bordering the visible light range, is of relevance to document inspection: IR light is used in special equipment, e.g. to detect data alteration.
Source : Click Here
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