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The diffraction pattern becomes invisibl...

The diffraction pattern becomes invisible when the slit is very wide. Give reason.

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Slit width or size should be of the order wavelength of light to observe diffraction of light. Hence diffraction pattern is invisible if the slit is very wide.
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Knowledge Check

  • Consider fraunhoffer diffraction pattern obtained with a single slit illuminated at normal indicent. At the angular position of the first diffraction minimum the phase different between the wavelets from the opposite edge of the slits is

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