A silicon monoxide (n = 1.45)film of 330 nm thickness is used to coat a glass camera lens (n = 1.56).What wavelength of light in the visible region (390 to 710 nm)will be most efficiently transmitted by this system? (1 nm = 10−⁹ m)

Name: A silicon monoxide (n = 1.45)film of 330 nm thickness is used to coat a glass camera lens (n = 1.56).What wavelength of light in the visible region (390 to 710 nm)will be most efficiently transmitted by this system? (1 nm = 10− 9 m)
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The Answer is C

A Silicon Monoxide (N = 1