Young's double-slit experiment is performed in a liquid. The 10 t h bright fringe in case of the liquid lies where 6 t h bright fringe lies in a vacuum. The refractive index of the liquid approximately is

Question

Young's double-slit experiment is performed in a liquid. The 10 t h bright fringe in case of the liquid lies where 6 t h bright fringe lies in a vacuum. The refractive index of the liquid approximately is, 1.8, 1.54, 1.67, 1.2

MARKS App · Accepted Answer

Fringe width in air is given by β a i r = λ D d Fringe width in liquid will be, β l i q = λ D μ d (as λ l i q = λ a i r μ ) 6 β a i r = 1 0 β l i q 6 λ D d = 1 0 λ D μ d μ = 1 0 6 = 1.67

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