1. PRISMS
Draw a diagram showing the dispersion of white light as it passes through a prism.

2. How do we get rainbows? Rainbows occur in the sky after rain.
They form when sunlight passes through the raindrops.
The drops split the white light from the sun into a spectrum of colours.
The colours that make up the spectrum are red, orange, yellow, green, blue, indigo and violet. (ROY-G-BIV)
This is called dispersion.

3. What colour is light that looks white?
Light that looks white is really a mixture of every different colour, jumbled
together so thoroughly that you can’t see any of them seperately.
When sunlight shines through raindrops or bounces off the back of a CD, the
hidden colours fly apart and reveal themselves in a rainbow pattern.

4. Why Do Colours Exist?
Colours exist because light waves can be different lengths.
If the waves a LONG, we see them as red.
If the waves are SHORT, we see them as blue.
Light waves are very short, even in red light. About waves stretching end-to-end would fit along a millimetre.

5. Prism Experiment https://www.youtube.com/watch?v=KgqV975EtA0
Set up your raybox on your science book. Shine a full beam of light onto a triangular prism and turn the prism until the spectrum of colours is formed.
Draw a diagram showing your observations (use coloured pencils to show the spectrum of colours)

6. Newtons Prism
Draw a diagram showing your experiment with the two prisms and
illustrating the result.

7. Next Lesson
Colour – explain why an object appears to be a certain colour
Explain how a filter changes the colour of a light seen.
Describe two ways different colours can be seen.