2 the sources must be monochromatic ie of a single

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Unformatted text preview: 2) The sources must be monochromatic (i.e., of a single wavelength). (3) The linear superposition principle is applicable. A laser is an excellent source of coherent and monochromatic light beam. • Slits S1 and S2 serve as a pair of coherent light sources. • A visible pattern of bright and dark parallel bands (called fringes) are produced on screen C. • Bright bands: produced by constructive interference. Dark bands: produced by destructive interference. 37.3 Light Waves in Interference Problem A laser beam ( = 632.8 nm) is incident on two sli...
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