Adding beams of light
Classroom Activity for 11-14
What the Activity is for
Combining colours of light.
Here you can arrange three overlapping coloured beams of light to fall onto a screen, showing the colours that arise from adding the beams together.
What to Prepare
- A three beam projector (typically this will have three filters (red, blue and green), perhaps with mirrors to generate three separate beams from one lamp)
- A white screen
What Happens During this Activity
Show the three beams initially overlapped, thereby producing white light. Then split them into the three primary beams, finally combining them in pairs to produce the secondary colours.