Using huygens's construction of secondary wavelets explain how a diffractionpattern is obtained on a screen due to a narrow slit on which a monochromaticbeam of light is incident normally.
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a)Using Huygen's construction of secondary wavelets explain how a diffraction pattern is obtained on a screen due to a narrow slit on which a monochromatic beam of light is incident normally. b)Show that the angular width of the first diffraction fringe is half that of the central fringe.
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