A thin mica sheet of thickness `2xx10^-6m` and refractive index `(mu=1.5)` is introduced in the path of the first wave. The wavelength of the wave used is `5000Å`. The central bright maximum will shiftA. (a) 2 fringes upwardB. (b) 2 fringes downwardC. (c) 10 fringes upwardD. (d) None of these

A thin mica sheet of thickness `2xx10^-6m` and refractive index `(mu=1

1.	A thin mica sheet of thickness `2xx10^-6m` and refractive index `(mu=1.5)` is introduced in the path of the first wave. The wavelength of the wave used is `5000Å`. The central bright maximum will shiftA. (a) 2 fringes upwardB. (b) 2 fringes downwardC. (c) 10 fringes upwardD. (d) None of these
Answer» Correct Answer - A Shift `=beta/lambda(mu-1)t` `=(beta)/((5000xx10^(-10)))xx(1.5)xx2xx10^-6=2beta`, i.e., 2 fringes upwards.

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A thin mica sheet of thickness `2xx10^-6m` and refractive index `(mu=1.5)` is introduced in the path of the first wave. The wavelength of the wave used is `5000Å`. The central bright maximum will shiftA. (a) 2 fringes upwardB. (b) 2 fringes downwardC. (c) 10 fringes upwardD. (d) None of these

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