These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.

Colour Mixing

From Solar Spark, this simple demonstration shows the effect of adding colours. Photos and pictures are often made up from just four colours black, cyan, magenta and yellow. Different amounts of each colour combine to get all the colours of the rainbow and make the complete picture.

Solar cells are optimised so that they are better at absorbing one colour better than another. A tandem cell is made up of a few solar cells connected together, each one absorbing a different colour. This allows the tandem cell to absorb the whole rainbow of colours and give us more electrical energy from the sun.

To use the images supplied, open each one using Internet Explorer and print onto overhead projector sheets. This activity can be used to illustrate:
* properties of light
* absorption
* transmission

Show health and safety information

Please be aware that resources have been published on the website in the form that they were originally supplied. This means that procedures reflect general practice and standards applicable at the time resources were produced and cannot be assumed to be acceptable today. Website users are fully responsible for ensuring that any activity, including practical work, which they carry out is in accordance with current regulations related to health and safety and that an appropriate risk assessment has been carried out.

Information on the creators and permitted use of this resource is covered by the Category Three Materials - Community Resources section in STEM Learning’s Terms and conditions