This activity is intended to show a really impressive spectrum, made by a prism, from a white light source.
This activity shows white light being split into colours, and then that a prism cannot split one of the colours further. In a...
Here you can arrange three overlapping coloured beams of light to fall onto a screen, showing the colours that arise from...
To reinforce that the combination of different coloured beams of light can produce any colour. It can be used as a homework.
Here you can draw together ideas about apparent colours, depending on the illumination.
Not only does light travel, it travels in straight lines through a given medium.
In 1666 Sir Isaac Newton studied the effect of passing a beam of light through a triangular glass prism. He completely...
Newton identified seven colours in the spectrum on his study wall:
An easier way to separate out light of different colours is to use coloured filters. For example, when white light passes...
The human eye does not detect frequencies directly. So when we see red, we do not necessarily see a narrow range of...
Combining three lamps covered with red, green and blue filters can make a whole range of colours.
Why does a red dress appear red in ordinary white light?
Recognising and celebrating outstanding contributions to the field of physics education.