Lag1989 task №20.42

The soap film is illuminated with radiation of the following spectral composition: 410.2 nm; 434 nm; 486.1nm; 656.3nm. Observation is carried out in reflected light. Which light waves λ will be maximally amplified and which ones will be maximally attenuated as a result of interference at a film thickness of d = 0.615 μm? The light falls perpendicular to the surface of the film. The refractive index of the soap liquid is n = 1.33.