What is propagation?

Propagation is when something moves from one place to another, like when a wave travels across water or a sound goes through the air.

Imagine you're at the beach, and you drop a stone into a calm pond. Ripples start at the point where the stone hits the water, and then they spread outwards, that’s propagation in action! The ripples are moving away from where the stone landed, just like how waves move when the wind blows.

Now think about your favorite song playing on a speaker. When the music starts, the sound goes through the air and reaches your ears. That's also propagation, the sound is traveling from one place to another so you can hear it.

If you're playing tag with friends and shout “You’re it!” across the yard, that message travels through the air until it reaches your friend’s ears. That’s like propagation, too! It's just how things move from one spot to another, whether it's water ripples, sound waves, or even a simple shout.