A glass lens nglass 152 has a 134 nm thick anti-reflective, Ask an Expert

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A glass lens (nglass = 1.52) has a 134 nm thick anti-reflective film (nfilm = 1.39) on one side. Light, moving through the air, is normally incident on the lens passing through the film. What is the largest wavelength of the light that is totally removed by the film?

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