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. two fringes upwardB. two fringes downwardC. ten fringes upwardD. 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. two fringes upwardB. two fringes downwardC. ten fringes upwardD. None of these
Answer» Correct Answer - A On introducing mica sheet, fringe shift `=beta/lambda(mu-1)t` where, t is thickness of sheet So, shift `=beta/((5000xx10^(-10)))xx(1.5-1)xx(2xx10^(-6))=2beta` So, central bright maxima will shift two fringes upward.

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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. two fringes upwardB. two fringes downwardC. ten fringes upwardD. None of these

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