Principle

By dividing up the wave-front of a beam of light at the Fresnel mirror and the Fresnel biprism, interference is produced. The wavelength is determined from the interference patterns.

Benefits


observe that light plus light can result in darkness

understand how to make use of the interference effect

a laser as lightsource allows clear observation



Tasks

Determination of the wavelength of light by interference


with Fresnel mirror,

with Fresnel biprism.


What you can learn about


Wavelength

Phase

Fresnel biprism

Fresnel mirror

Virtual light source