Question

Why fringes obtained by transmitted light are generally compared to the case of reflected light in film interference?

Answer 1

Interference by Thin Film

 

Table of Content

Colours of Thin Films

Interference in Thin Films

Interference due to the Reflected Beam

Interference due to the Transmitted Light

Related Resources


Colours of Thin Films

Everyone is familiar with the brilliant colours exhibited by a thin oil film spread on the surface of water and also by a soap bubble. These colours are due to interference between light waves reflected from the top and the bottom surfaces of thin films. When white light is incident on a thin film, the film appears coloured and the colour depends upon the thickness of the film and also the angle of incidence of the light.