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canvas prints 633 nm canvas prints coherent canvas prints demonstration canvas prints diffract canvas prints diffraction canvas prints double slit canvas prints experiment canvas prints interference canvas prints laser canvas prints light canvas prints monochromatic canvas prints optical canvas prints optics canvas prints physics canvas prints red laser canvas prints

photographs 633 nm photos coherent photos demonstration photos diffract photos diffraction photos double slit photos experiment photos interference photos laser photos light photos monochromatic photos optical photos optics photos physics photos red laser photos

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Interference pattern observed in a modern-day replica of Thomas Young's double-slit experiment. Here a coherent beam from a diode laser (635 nm) is incident on two closely-spaced slits (25 micron width, and a 45 micron distance between slits). Light transmitted by the two slits diffracts into the free space and the resulting interference fringes are photographed on a screen. This is a classic demonstration of the wave nature of the light. Characteristic laser speckle causes a grainy appearance of the pattern. Digitally manipulated.