Question

a) What do you mean by a complementary colour?
b) Study the following figures and identify P and Q.

Answer 1

a) Complementary colours are the pair of colours which combine with a primary colour to get white light.
b) i. $P\to$ Magenta: When green and magenta combine, they form white light.
ii. $Q\to$ Blue: When blue and green are mixed, cyan is obtained.