We see so many colourful and unique objects all around us. On our way to school, we pass by buses, automobiles, bicycles, trees, animals, and occasionally, flowers. How do we see all of these objects? Consider the same locations at night if it were dark. What are you going to see? Assume you enter a fully dark room. Is it possible for you to see anything in the room? But, isn't it true that when you light a candle or a torch, you can see the objects in the room? Things cannot be seen in the absence of light – light allows us to see them.
A torch bulb is an object that emits its own light. Another well-known entity that emits its own light is the sun. Its light lets us view the world during the day. Luminous objects, such as the sun, give off or emit light of their own.
Light, Shadows, and Reflections is an NCERT Science chapter for class 6 that exposes you to the world of light and its qualities. Surprisingly, both mirrors and reflections make use of light, but this is owing to the differences in their properties. You've probably seen rainbows form after a rainstorm—this is due to reflection.