A thin transparent film of refractive index 1.25 is coated on the surface of a thick glass plate (refractive index 1.50). Calculate the minimum thickness of the film so that the monochromatic light beam with wavelength λ ₁ = 0.60 µm is eliminated and the monochromatic light beam with wavelength λ ₂ = 0.50 µm is enhanced due to interference of reflected rays. radiation on the surface of thin films. Indicates that the light beam is directed from the outside air to the thin film in a perpendicular direction and the glass plate is placed in the air.