Consider a case of thin film interference as shown.Thickness of film is equal to wavelength of light in `mu_(2)`

Thin Film Interferance

YDSE-2 & thin film interference

Interference By a thin film

When the plastic thin film of refractive index 1.45 is placed in the path of one of the interfering waves then the central fringe is displaced through width of five fringes.The thickness of the film will be ,if the wavelength of light is 5890Å

When the plastic thin film of refractive index 1.45 is placed in the path of one of the interfering waves then the central fringe is displaced through width of five fringes.The thickness of the film will be ,if the wavelength of light is 5890Å

A : If a thin soap film is arranged vertically the spectrum of coloured fringes are spread equally on the film. R : The colours of the film is dependent on the thickness of film and wavelength of the light.

Interference of light, Thin film interference and Introduction to YDSE

Thin Film Interference||FraunhOFer Diffraction