question_answer

In Young's double slit experiment, a mica slit of thickness t and refractive index m is introduced in the ray from the first source S1. By how much distance the fringes pattern will be displaced    [RPMT 1996, 97; JIPMER 2000; RPMT 2003]

A)            \[\frac{d}{D}(\mu -1)\ t\]       

B)            \[\frac{D}{d}(\mu -1)\ t\]

C)            \[\frac{d}{(\mu -1)D}\]    

D)            \[\frac{D}{d}(\mu -1)\]