Incoherent and Coherent superposition

Incoherent and Coherent superposition

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Caption: Incoherent and coherent superposition. When two coherent waves of light are superimposed, the resulting intensity depends on the phases of both waves. Here a laser beam was spit into two beams that were then crossed at a small angle. Characteristic interference fringes were observed (bottom panel). For two incoherent waves, the total intensity is a sum of individual intensities. Here this was obtained by making a double exposure and blocking each beam one at a time (top panel).

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Keywords: addition, blue, blue light, coherent, comparison, double exposure, example, fringes, ideal property, incoherent, interfere, interference visibility, laser, light beam, light interference, light waves, optical, optics, physics, property of waves, scientific, superimposed, superposition, superposition principle, wave

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