This activity is intended to show a really impressive spectrum, made by a prism, from a white light source.

Classroom Activity 11-14

This activity shows white light being split into colours, and then that a prism cannot split one of the colours further. In a...

Classroom Activity 11-14

Here you can arrange three overlapping coloured beams of light to fall onto a screen, showing the colours that arise from...

Classroom Activity 11-14

To reinforce that the combination of different coloured beams of light can produce any colour. It can be used as a homework.

Classroom Activity 11-14

Here you can draw together ideas about apparent colours, depending on the illumination.

Classroom Activity 11-14

Not only does light travel, it travels in straight lines through a given medium.

Physics Narrative 11-14

In 1666 Sir Isaac Newton studied the effect of passing a beam of light through a triangular glass prism. He completely...

Physics Narrative 11-14

Newton identified seven colours in the spectrum on his study wall:

Physics Narrative 11-14

An easier way to separate out light of different colours is to use coloured filters. For example, when white light passes...

Physics Narrative 11-14

The human eye does not detect frequencies directly. So when we see red, we do not necessarily see a narrow range of...

Physics Narrative 11-14

Combining three lamps covered with red, green and blue filters can make a whole range of colours.

Physics Narrative 11-14

Why does a red dress appear red in ordinary white light?

Physics Narrative 11-14