In a certain double slit experimental arrangement interference fringes of width \( 1.0 \mathrm{~....

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In a certain double slit experimental arrangement interference fringes of width \( 1.0 \mathrm{~mm} \) each are
\( \mathrm{P} \)
observed when light of wavelength \( 5000 \AA \) is used. Keeping the set up unaltered, if the source is replaced by another source of wavelength \( 6000 \AA \), the fringe width will be
(1) \( 0.5 \mathrm{~mm} \)
(2) \( 1.0 \mathrm{~mm} \)
(3) \( 1.2 \mathrm{~mm} \)
(4) \( 1.5 \mathrm{~mm} \)


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