Solution to task 502 from Chertov´s for extramural stud

Solution to task 502 from Chertov´s for extramural stud

502. Monochromatic light with a wavelength λ = 500 nm is incident on a thin film in the direction normal to its surface. The light reflected from it is maximized due to interference. Determine the minimum film thickness dmin if the refractive index of the film material n = 1.4