You have just put some medical eyedrops on your sensitive eyes. The cornea has an index of refraction of 1.38, while the eye drops have a refractive index of 1.45. After you put in the drops, your friends notice that your eyes look red, becuase red light of a wavelength of 600 nm has been reinforced in the reflected light.
(a) What is the minimum thickness of the film of eyedrops on your cornea?
(b) Will any other wavelengths of visible light be reinforced in the reflected light? Will any be cancelled?
(c) Suppose you had contact lenses, so that the eyedrops went on them instead of your corneas. If the refractive index of the lens material is 1.50 and the layer of eyedrops has the same thickness in part (a), what wavelengths of visible light will be reinforced? What wavelengths will be cancelled?
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