The thickness that corresponds to that m is 1081, which means that i have to add 45 nm to the existing film. I tried it and it was right! Thank you so much :-)
Homework Statement
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 515 nm falls at normal incidence onto the film from air. You want to increase the thickness of this...