What is wavelength?

Wavelength is how long each wave is from one peak to the next.

Imagine you're at the beach, watching the waves come in. Each wave has a crest, that's the top part, and then it goes down again. The distance between two crests is the wavelength. It’s like measuring how far apart the waves are as they roll toward shore.

If you throw a stone into a pond, it makes ripples. Those ripples spread out in circles. If you measure from one ripple to the next, that's your wavelength! The bigger the stone, the bigger the ripples, and the longer the wavelength.

Think of a jumping rope. When two people shake it, it makes waves that go up and down. From one high point to the next high point is the wavelength, just like on the beach or in the pond.

So wavelength is all about how far apart the waves are, whether they're on water, light, or sound!