Light Dispersed by Diffraction Grating

Light Dispersed by Diffraction Grating

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Credit: GIPHOTOSTOCK/SCIENCE PHOTO LIBRARY

Caption: Colorless or white light as perceived by human eye actually consists of many colors or wavelengths of light. Shown here is a beam of white light passing through a diffraction grating. Diffracted light propagates along discrete directions, called diffraction orders. The zeroth order does not exhibit dispersion (white beam). The light diffracted into the +1 and -1 diffraction orders is dispersed (decomposed) into different colors. Also visible but faint are the +2 and -2 diffraction orders.

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Keywords: beam, color, demo, demonstration, diffract, diffraction, dispersion, dispersive, education, educational, effect, experiment, grating, light, optical, optics, phenomenon, photonics, physics, science, scientific, spectral, spectrum, technology, visible, wavelength, white

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