A uniform film of TiO2 ,1036 nm thick and having index of refraction 2.62, is spread uniformly over the surface of crown glass of refractive index 1.52. Light of wavelength 520.0 nm falls at normal incidence onto the film from air. You want to increase the thickness of this film so that the reflected light cancels. (a) What is the minimum thickness of TiO2 that you must add so the reflected light cancels as desired?
(b) After you make the adjustment in part (a), what is the path difference between the light reflected off the top of the film and the light that cancels it after traveling through the film?
Express your answer in (i) nanometers and (ii) wavelengths of the light in the TiO2film.