4) Light of wavelength 725 nm is incident on a slit of width 0.25 mm, and a diffraction pattern is produced on a screen.
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4) Light of wavelength 725 nm is incident on a slit of width 0.25 mm, and a diffraction pattern is produced on a screen.
4) Light of wavelength 725 nm is incident on a slit of width 0.25 mm, and a diffraction pattern is produced on a screen. Find the angle for the third dark fringe (inm=10^-9m, 1mm=10^-3m) th
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