Q46 In Young s double slit experiment the source is red

Last updated: 6/11/2023

Q46 In Young s double slit experiment the source is red light of wavelength 7 x 10 7 m When a thin glass plate of refractive index 1 5 at this wavelength is put in the path of one of the interfering beams the central bright fringe shifts by 10 3 m to the position previously occupied by the 5th bright fringe Find the thickness of the plate When the source is now changed to green light of wavelength 5 10 7 m the central fringe shifts to a position initially occupied by the 6th bright fringe due to red light Find the refractive index of glass for green light Also estimate the change in fringe width due to the change in wavelength 1997