Time taken by sunlight to pass through a window of thickness `4 mm` whose refraactive index is `(3)/(2),` is

Time taken by sunlight to pass through a window of thickness 4 mm whose refractive index is (3)/(2), is

Time taken by sun light to travel through a glass slab of thickness 5mm whose refractive index is 1.5 in sec is

Time taken by the sunlight to pass through a slab of thickness 4 mm and refractive index 3 is ........ sec.

Time taken by the sun igth to pass through a glas slab of 2 mm thickness,whose rrefrative index is 1.5 ,is

Time taken by the sunlight to pass through a slab of 4 cm and refractive index 1.5 is ...... s.