Problem: A glass plate that has refractive index n = 1.50 and that is 6.00 x 10 -7 m thick is surrounded by air. The plate is illuminated by a beam of white light that is normal to the plate. What wavelengths in air within the limits of the visible spectrum (λ = 400 nm to 700 nm) have destructive interference between the light reflected from the upper and the lower surfaces of the plate?

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A glass plate that has refractive index n = 1.50 and that is 6.00 x 10 -7 m thick is surrounded by air. The plate is illuminated by a beam of white light that is normal to the plate. What wavelengths in air within the limits of the visible spectrum (λ = 400 nm to 700 nm) have destructive interference between the light reflected from the upper and the lower surfaces of the plate?

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