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प्रश्न
In Fraunhofer diffraction, how is the angular width of the central bright fringe affected when slit separation is increased?
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उत्तर
In Fraunhofer diffraction at a single slit, we obtain a central bright band, having on both sides narrower
alternately dark and bright bands of decreasing intensity. Finer the slit, broader is the diffraction pattern and wider is the central band as shown in the given figure.
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