A light wave travels from air into a medium of refractive index 1.54. If the wavelength of the light in air is (5.9times10^{-7})m, calculate its wavelength in the medium
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A.
(2.5times10^{-7})m -
B.
(3.8times10^{-7})m -
C.
(4.6times10^{-7})m -
D.
(5.2times10^{-7})m -
E.
(6.1times10^{-7})m
Correct Answer: Option B
Explanation
n =(frac{wavelength, in, air}{wavelength, in ,medium}= frac{5.9times10^{-7}}{1.54}= 3.8times10^{-7})m