Question

White light consists of seven colours.Can we mix the seven colours to get white light.Explain your answer

Answer 1

Yes

When white light is passed through a prism, it splits into seven different colours namely, red, orange, yellow, green, blue, indigo and violet. If we do the reverse, that is mix the beams of light of all colour, white light is obtained.

Take a circular piece of card paper. Divide it into 7 equal partitions and paint each partition with one colour of the rainbow. Now spin this card paper very fast and you will see that it looks white.