The ratio of the refractive indices of two adjacent layers is given by "n2/n1 = 0.77". If the wavelength of light in medium-1 is 8 um, then its wavelength in medium-2 is: (Given: 1 um = 10^-6 m) O 6.16 um O 11.1 um O 9.3 um O 6.88 um O 5.76 um O 10.4 um
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