Rainbow Spinner

For our first science experiment Room 8 created a Rainbow Spinner. If you are interested in doing this experiment, you will need the following materials.

Colouring Pencils/Pastels
Cardboard Ruler
Scissors Pencil
Glue
1 metre of thread/string
Compass/Hole Punch (Optional)

Method:
Step1. You will need two identical cardboard circles [I suggest that you do this before hand] and divide them into equal segments/parts

Step2. Once divided into segments/parts, decide what colours you are willing to use e.g. Pastels or Colouring Pencils.

Step3. Colour in both of your circles exactly the same or else the result will be different.

Step4. When coloured, glue the two circles together and punch in two holes that are approximately 1or 2 centimetres apart in the centre of the circles

Step5. Now the tricky part – certainly und this tricky, insert the string through the holes and tie a knot at the end.
(It will be doubled)

Step6. Now the fun part! Spin the spinner until the string is fully twisted then pull your hand apart to see the colours merge into one!


When the spinner spins really fast you will see light reflected from all the colours, but your brain cannot separate them. So you see a mixture of all colours, which is white. Your spinner may look grey to you because the colours are not pure.

Maxine