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Electromagnetic spectrum. Computer artwork showing part of the electromagnetic spectrum. Wavelength increases from top to bottom. At bottom is infrared light (flat red lines). Next is visible light, which ranges from red light (700 nm, red tube) to violet light (400 nm, violet tube). Above violet is ultraviolet (flat violet lines). In this graphic, the waves are simplified and arranged as a linear array, whose wavelengths increment by 50 nm.
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