You are aware that a plane mirror forms only a single Image of an object. What happens If two plane mirrors in combination are used? Let us see.Can you now explain how you can see the back of your head at the hair dresser's shop? This idea of number of images formed by mirrors placed at an angle to one another is used in a kaleidoscope to make numerous beautiful patterns. You can also make a kaleidoscope yourself.
Sunlight - White or Coloured : you learnt that the sunlight Is referred to as white light. You also learnt that It consists of seven olours.