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Diffraction grating |
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In optics, a diffraction grating is an array of fine, parallel, equally spaced grooves ("rulings") on a reflecting or transparent substrate, which grooves result in diffractive and mutual interference effects that concentrate reflected or transmitted electromagnetic energy in discrete directions, called "orders," or "spectral orders."
When there is a need to separate light of different wavelengths with high resolution, then a diffraction grating is most often the tool of choice. |
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