A Young's double-slit arrangement produces interference fringes for sodium light (λ=5890 A0) that are 0.20 apart. The angular fringe separation if the entire arrangement is immersed in liquid of refractive index 53
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a
0.240
b
0.360
c
0.120
d
0.480
answer is C.
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Detailed Solution
Angular fringe width in air θ=0.20 Refractive index μ=53 Angular fringe width in liquid θ'=? θ1=θμ =0.253 ∴θ'=0.120