We can see things because light from them enters our eyes.

A light source is an object that emits its own light.

Hot objects, such as a flame and the Sun, are natural light sources.

A torch bulb has a hot filament, so it is also a light source.

An object which is a source of light is described as luminous. An object which is not a source of light is described as non-luminous. We can see non-luminous objects because they reflect light to our eyes. For example, a chair in front of you is non-luminous. The person can see it because the light from the bulb reflects off it. make it as a points

Light travels in straight lines.

It moves very fast — approximately 300,000 km per second in a vacuum.

Light can travel through transparent materials (like air, water, and glass).

It cannot pass through opaque objects; instead, it casts a shadow.

Light can be reflected (bounces off surfaces) and refracted (bends when passing through different materials).

Light can also be absorbed by some surfaces, converting it into heat.