A monochromatic ray of light travels through glass slab and water column. The number of waves in glass slab of thickness 4 cm is the same as in water column of height 5 cm . If refractive index of gla

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A monochromatic ray of light travels through glass slab and water column. The number of waves in glass slab of thickness 4 cm is the same as in water column of height 5 cm . If refractive index of glass is 3 5 ​ , then refractive index of water is

TestHub · Accepted Answer

If the number of waves in N , then the wavelength in water is N 5 ​ cm and wavelength in glass is N 4 ​ cm . ​ λ w ​ = N 5 ​ , λ g ​ = n 4 ​ w ​ μ g ​ = λ g ​ λ w ​ ​ = 4 5 ​ μ w ​ μ g ​ ​ = 4 5 ​ μ w ​ = 5 4 ​ μ g ​ = 5 4 ​ × 3 5 ​ = 3 4 ​ = 1.33 ​

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