A thin mica sheet of thickness \[2\times {{10}^{-6}}m\]and refractive – McqOptions

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1.	A thin mica sheet of thickness \[2\times {{10}^{-6}}m\]and refractive index \[(\mu =1.5)\] is introduced in the path of the first wave. The wavelength of the wave used is 5000 Å. The central bright maximum will shift [CPMT 1999]
A.	2 fringes upward
B.	2 fringes downward
C.	10 fringes upward
D.	None of these
Answer» B. 2 fringes downward

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