In Lloyds interference experiment, 10 fringes occupy a space of \( 1.5 \mathrm{~mm} \). The dist...

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In Lloyds interference experiment, 10 fringes occupy a space of \( 1.5 \mathrm{~mm} \). The distance between the source and the screen is \( 1.25 \mathrm{~m} \). If light of wavelength \( 6000 \AA \) is used, find the distance of the source from the plane minor.
(a) \( 2.5 \mathrm{~mm} \)
(b) \( 5 \mathrm{~mm} \)
(c) \( 0.25 \mathrm{~mm} \)
(d) \( 3 \mathrm{~mm} \)
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