How Does Propagation of light explained Work?

Light travels in straight lines, just like when you roll a ball across the floor.

Imagine you're playing with a flashlight in a dark room. When you turn it on, light comes out of the flashlight and goes straight until it hits something, like a wall or your toy car. That’s how light moves from one place to another: it keeps going in a straight path until something stops it or changes its direction.

Think about a line of kids passing a message. The first kid says, “Hello!” and passes the message to the next one, who then says, “Hello!” and passes it on, all the way down the line. Light is like that message. It starts at its source (like your flashlight), travels in a straight path, and continues until something stops it or reflects it.

If light hits a smooth surface, like a mirror, it bounces back, just like how a ball bounces off the floor. If it hits something rough, like a blanket, it scatters in many directions, which is why you can see the blanket from all around the room.

So, propagation of light is just light moving in straight lines until it meets something that changes its path, and that’s how we see everything around us!