V PartA A plastic film with index of refraction 1.70 is applied '1 to the surface of a car window to increase the reflectivity and thus to keep the car's interior cooler What minimum thickness is required it light of wavelength 550 nm in air reflected from the two sides of the film is to The window glass has index of refraction 1.52. Interfere constructively? Express your answer with the appropriate units. h: 81mm Previous Answers v Correct V PartB Coatings as thin as that calculated in part A are difficult to manufacture and install. What is the next greater thickness for which constructive interference will also occur? Express your answer with the appropriate units. Quest