Optics > spectra

Producing a simple spectrum by dispersion of light.

Class demonstration of a spectrum, and the appearance of coloured objects in coloured light.

A class demonstration of the spectrum.

This is a recreation of Herschel’s experiment, published in 1800, in which he discovered infra-red radiation.

Observing the spectra from a variety of light sources.

Using a spectrometer to observe the absorption lines formed when white light passes through sodium vapour.

Using prism, needle and sunlight to observe a spectrum.

Using a spectrometer to see absorption lines.

Students use a diffraction grating as a tool for observing the spectra from a variety of light sources.