An extremely thin sheet of glass is being inspected at thefactory. Illuminated by white light at near-normal incidence, thefilm-like sheet is 0.402 µm thick and has air on both sides. If theglass has a refractive index of 1.52, what wavelength of visiblelight (in nm) does it reflect most strongly? (The wavelengths ofvisible light range from 400 to 700 nm.)
