Briefly mention the process of light

Most of the objects reflect light which falls on them. Some objects reflect more light whereas other objects reflect less light. The objects having polished shinning surfaces reflect more light than objects having unpolished dull surfaces. Like shinning silvered mirror reflects back almost all the light which falls on it. The smooth surface of the still water could also act as a mirror. A shining stainless steel plate or a shining steel spoon can change the direction of light.

Take a torch and cover its glass with a chart paper which has three slits. Spread a sheet of chart paper on a smooth wooden board. Fix a plane mirror strip vertically on the chart paper. Now direct the beam of light on the mirror from the torch with slits. Place the torch in such a way that its light is seen along the chart paper on the board. Now adjust its position so that the light from the torch strikes the plane mirror at an angle. The plane mirror reflects the three rays of light falling on it.