Section-C: Comprehension Type
In a Young’s double slit experiment set up, source S of wavelength 6000Å illuminates two slits S1 and S2 which act as two coherent sources. The source S oscillates about its shown position according to the equation y = 1 + cos πt
where y is in mm and t is in s. P is taken to be the origin of co-ordinate system.
At t = 1 second, a slab of thickness 2 × 10–3 mm and refractive index 1.5 is placed in front of S1. The central maxima is formed at