In a Young’s double slit experiment, an angular width of the fringe is 0.53° on a screen place at 2m away for particular wavelength of 450 nm. The angular width of the fringe, when whole system is immersed in a medium of refractive index 7/5, is 1 α .  The value of a is__________.

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    alok kumar singh | Contributor-Level 10

    3 months ago

    we know, = λd μ=CV=Cυλ

    λ1=Cμ1υ1 [with change in medium frequency refnain constaint]

    λ2=Cμ2υ2

    λ2λ1=μ1μ2=57 λ2=57λ1

    θ1=λ1d1

    2 = λ2d2

    θ2θ1=λ2λ1[?d1=d2]

    =57×θ1

    θ2=57×0.35

    θ2=14=1α

    = 4

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