What are light beams?

Light beams are like super-fast trains that carry light from one place to another.

Imagine you're playing with a flashlight in a dark room. When you turn it on, the light goes out in a straight line, kind of like a train moving down a track. That line of light is what we call a light beam.

Think of your flashlight as a station, and the light as the passengers. When you press the button, the passengers (the light) get on the train and zoom out in a straight path, that’s your light beam.

You can see this same idea when sunlight comes through a window. It shines straight into the room like a wide train track, making everything bright and visible.

If there are obstacles in the way, like curtains or a wall, they can block some of the passengers (the light), which makes things look dimmer, just like how a tunnel would make the train feel more enclosed.