What is light?

Light is an energy and it helps us see the things around us. Light comes from different sources such as the Sun or a light bulb. When the Sun rises each day, the sky brightens and we can see the world. If we turn on a light bulb in a dark room, objects become visible to us. Without light, our world would be in darkness.

During a thunder storm, there is lightning. Lightning is a flash of light that streaks across the sky. It gives out a very bright light that only lasts for only a fraction of a second. There are some deep-sea fish that makes their own light. Before we had electric lights, people used fires, candles, flaming torches and oil lamps to light up their world. The strong beam of light from the light house warns ships at sea of rocks and shallow water.