Diffraction Grating
$1.99
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13,500 line/in 2x2 inch slide Hold to the light and watch it separate out the wavelengths of the light you're looking at! In optics, a diffraction grating is an optical grating with a periodic structure that diffracts light into several beams traveling in different directions (i.e., different diffraction angles). The emerging coloration is a form of structural coloration (like how some species of butterflies appear to be blue, but it's just diffraction, not pigment!)
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