A light wave travels from air into a medium of refractive index 1.54. If the wavelength of the light in air is \(5.9\times10^{-7}\)m, calculate its wavelength in the medium

A. \(2.5\times10^{-7}\)m
B. \(3.8\times10^{-7}\)m  
C. \(4.6\times10^{-7}\)m
D. \(5.2\times10^{-7}\)m
E. \(6.1\times10^{-7}\)m

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Correct Answer: B