A mono chromatic lightwave moves from one transparent medium to another The refractive index of the second medium is thrice the

Question

A mono chromatic lightwave moves from one transparent medium to another The refractive index of the second medium is thrice the refractive index of the first medium If the wavelength of light in first medium is 6 x 10 7 m then the wave length of the lightwave in second medium would be 1 1 x 10 7m 2 2 x 10 7 m 4 18 x 10 7m 3 9 x 10 7 m

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