A monochromatic beam of light falls on YDSE apparatus at some angle (s – McqOptions

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1.	A monochromatic beam of light falls on YDSE apparatus at some angle (sayq) as shown in figure. A thin sheet of glass is inserted in front of the lower slit S2. The central bright fringe (path difference = 0) will be obtained
A.	At O
B.	Above O
C.	Below O
D.	Anywhere depending on angleq, thickness of plate t and refractive index of glass m
Answer» E.

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