Q45 In a Young s double slit experiment the upper slit is

Last updated: 6/11/2023

Q45 In a Young s double slit experiment the upper slit is covered by a thin glass plate of refractive index 1 4 while the lower slit is covered by another glass plate having the same thickness as the first one but having refractive index 1 7 Interference pattern is observed using light of wavelength 5400 It is found that the point P on the screen where the central maximum n 0 falls before the glass plates were inserted now has 3 4 the original intensity It is further observed that what used to be the fifth maximum earlier lies below the point P while the sixth minima lies above P Calculate the thickness of glass plate Absorption of light by glass plate may be neglected 1997