A thin film (n = 1.25) coats a thick glass plate (n = 1.50). White light is incident normal to the film. In the reflections, fully destructive interference nccurs at 600 mm and fully constructive interference at 700 nm. Calculate the thickness of the film.

A thin film (n = 1.25) coats a thick glass plate (n = 1.50). White

1.	A thin film (n = 1.25) coats a thick glass plate (n = 1.50). White light is incident normal to the film. In the reflections, fully destructive interference nccurs at 600 mm and fully constructive interference at 700 nm. Calculate the thickness of the film.
Answer» SOLUTION :840 nm

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A thin film (n = 1.25) coats a thick glass plate (n = 1.50).﻿ White light is incident normal to the film. In the reflections, fully destructive interference nccurs at 600 mm and﻿ fully constructive interference at 700 nm. Calculate the﻿ thickness of the film.

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A thin film (n = 1.25) coats a thick glass plate (n = 1.50). White light is incident normal to the film. In the reflections, fully destructive interference nccurs at 600 mm and fully constructive interference at 700 nm. Calculate the thickness of the film.