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The visibility of fringes is given by the expression ___________

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The visibility of fringes is given by the expression ___________

(a) lmax/lmin

(b) lmin/lmax

(c) lmin + lmax / lmin – lmax

(d) lmin – lmax / lmin + lmax

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Asked question is from Young’s Experiment in division Interference of Engineering Physics II

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Correct answer is (d) lmin – lmax / lmin + lmax

The best I can explain: The visibility of fringes observed in Young’s double slit experiment is given by the expression: lmin– lmax / lmin + lmax. Maximum intensity for the bright fringes while minimum intensity is for the dark fringes.

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