• Brainly User
Take a torch light in the dark and then just simply throw the light on the crystal prism and then look what will happen...........
Do this experiment in a dark room.take a prism and place it on table near a vertical white wall.take a thin wooden plank.make a small hole in it and fix it vertically on the the prism between the wooden plank and a white light source behind the wooden plank.switch on the light . the rays coming out of the plank become a narrow beam of light.adjust the height of the prism such that the light falls on one of lateral surfaces.observe the changes in emerged rays of prism.we observe the colours on the wall.the white light is splitting into colours because of dispersion.