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Light originating in air is normally incident on a thin film of thickness
150nm with index of refraction n₁ = 1.5 that lies on top of a material
with index of refraction n₂ = 1.2, as illustrated.
nAir
n1
n2
Determine the longest wavelength of light that is maximally reflected.
O 450nm
O 900nm
O 600nm
O 300nm

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