Waves > light

This is a simple demonstration of the interference of the light. From this, students can calculate the wavelength of the light source. 

Two overlapping patches of light make bright and dark bands, giving direct evidence for the wave nature of light.

Coloured bands of light are produced in thin films because of path differences and interference.

In this simple experiment, each student holds a pair of glass plates individually.

This simple demonstration shows how the interference of light can be used to determine the thickness of a thin film.

A diffraction pattern showing bands of colour produced from white light.

Exploring the diffraction pattern produced from white light.

Observing a two-dimensional diffraction pattern.

Students observe the spectrum produced when light falls obliquely on a CD.

Interesting diffraction effects seen in shadows.

A simple and elegant experiment to measure the wavelength of light using a fine diffraction grating.

A laser is used to illustrate how crystal geometry can be inferred from X-ray diffraction patterns.

This is a simple and economic demonstration of the diffraction of light by a narrow opening, from which the wavelength of light can be determined.