A monochromatic beam of light falls on YDSE apparatus at some angle (say θ) as shown in figure. A thin sheet of glass (Refractive index =μ) is inserted in front of the lower slit S2. The central bright fringe will be obtained
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a
at O
b
above O
c
below O
d
anywhere deepening on angle θ, thickness of plate t and refractive index of glass μ
answer is D.
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Detailed Solution
If d sinθ=(μ−1)t, central fringe is obtained at O.If d sinθ>(μ−1)t, central fringe is obtained above O and If d sinθ<(μ−1)t central fringe is obtained below O.
A monochromatic beam of light falls on YDSE apparatus at some angle (say θ) as shown in figure. A thin sheet of glass (Refractive index =μ) is inserted in front of the lower slit S2. The central bright fringe will be obtained