What Is Light

Light is a form of energy that we can see. Energy is the ability to make things happen or change. Light makes it possible for us to see everything around us.

Light comes from different sources. A source is where something comes from. The sun is our biggest and most important light source. It gives us light during the day. Other light sources include light bulbs in our homes and schools, flashlights, candles, and fire. Even some animals, like fireflies, can make their own light!

Without light, we cannot see anything. When you are in a completely dark room, you cannot see the toys, books, or furniture around you. This is because light must travel from a source to the objects around us, and then to our eyes. Think of it like this: light is like a messenger that carries information about objects to your eyes.

During the day, sunlight bounces off objects like your desk, your friend's face, or a tree. This bouncing light then travels to your eyes, and that is how you see things. At night, we use artificial light from light bulbs and other sources. Artificial means made by people, not natural. These light sources help us see when the sun is not shining.

Light travels very fast—faster than anything else in the universe. It can travel through air, water, and even empty space. That is how sunlight reaches Earth from millions of miles away!