Newton's Ring Apparatus
Newton's Ring Apparatus
In this apparatus, light from a sodium lamp falls on the glass plate, inclined at 45 degree to the horizontal, get reflected, and then falls normally on the convex lens placed over the glass plate. A system of bright and dark concentric circular rings are observed through a microscope, arranged vertically above the glass plate. The microscope is properly focused so that alternate bright and dark concentric circular rings are observed more clearly. Measurements are taken from a micrometer driven traveling microscope, which is integrated with this apparatus.
Product Features
A microscope with x-y-z axes movement
Horizontal measurement scale with fine and coarse movement screw
Cross wire in the field of view for ring`s diameter measurement
Newton`s ring assembly consisting of plano-convex lens mounted on an optically plane glass plate
Adjustable plane glass plate is provided to be inclined at respect to the vertical plane
Sodium vapour lamp as the monochromatic light source
Scope of Learning
Determination of the Wavelength of sodium light by measuring the diameters of Newton's rings.
Determination of the Refractive Index of a liquid transparent medium such as water using Newton's ring apparatus.
To find the refractive index of liquid.
To determine the wavelength of Sodium light and LEDs ( Red, Blue, Green, Yellow ).
