On April 26,2018

Interference of Light on Thin films – Newton’s Rings

Dr. K. Vagdevi

The wavelength of given source of light is determined by forming Newton’s rings. The experiment is done by using the sodium lamp and travelling microscope. The results are compared using virtual lab. This allows for simulation of physical optics phenomena such as diffraction and interference. With this capability, components such as Gaussian laser beams and interferometers can be accurately modeled and incorporated into optical systems. The Newton’s rings form when reflections from a spherical surface in contact. The interference pattern is based on increasing optical path difference from the point of contact outward. As spherical surface curvature increases, the amount of rings increases.


Y. Sree Swiya