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Transmission of light. (A) Light is electromagnetic radiation that travels as waves consisting of perpendicular oscillating electric and magnetic fields. (B) Visible light is a narrow group of wavelengths between approximately 400 nm (short wavelength) and 760 nm (long wavelength) which we interpret as a spectrum of different colors. Wavelengths outside this range are not visible to humans. (C) Light can be reflected, absorbed and refracted.
