A thin film of ethyl alcohol (n = 1.36) lies on top of water (n = 1.33).  When sunlight is incident at right angles to this film, the only colors that are absent from the reflected light are orange (λ = 600 nm) and blue (λ = 450 nm).  Find the thickness of the ethyl alcohol film

White light is normally incident on an oil film floating on water. If the oil has an index of refraction of n = 1.52 and the thickness t=287 nm, determine the following. (a) wavelength of the light in the visible spectrum (400 nm-700 nm) most strongly reflected nm (b) wavelength of the light in the visible spectrum (400 nm-700 nm) most strongly transmitted nm Additional Materials

White light hits the surface of a thin film (n = 1.6) perpendicularly. There is air on both sides of the membrane. The wavelengths 504 nm and 672 nm are missing from the reflected light. a) What is the minimum thickness of the thin film? b) Which wavelengths are strongly visible in the reflected light?

A light ray whose frequency is 7.00 × 1014 Hz in vacuum is incident on glass (n = 1.50). Determine the wavelength of the light after it enters the glass (in nm).      (c = 3 x 108 m/s)