Physics making white light from red blue and green

Using RGB LEDs to create white light.
The three different coloured leds are shone on a white card. The blue and the red combine to make magenta, the red and the green combine to make yellow and the blue and the green combine to make turquoise or cyan and all together they combine to make white light.
So in this experiment we can see that white light is made up from several different colours.

Philip M Russell Ltd