9 Two parallel rays are travelling in a medium of refractive

Last updated: 6/8/2023

9 Two parallel rays are travelling in a medium of refractive index 4 3 One of the rays passes through a parallel glass slab of thickness t and refractive index 2 3 2 The path difference between the two rays due to the glass slab will be a 4 t 3 c f 8 b 3t 2 d t 6