In a Newton's rings apparatus, monochromatic light interferes in the thin film of air between the slightly convex lens and a plane glass plate. The wavelengths are determined from the radii of the interference rings.
- the color of soap bubbles is based on it: interference in thin films
- use interference optics to determine most subtle differences
- elaborate filters make quantitative measurements possible
Using the Newton's rings apparatus, to measure the diameter of the rings at different wavelengths and:
- to determine the wavelengths for a given radius of curvature of the lens
- to determine the radius of curvature at given wavelengths.
What you can learn about
- Coherent light
- Phase relationship
- Path difference
- Interference in thin films
- Newton's ring apparatus