Need a demonstration of interference in Waves

[Slason]

Hey,

I am having a project in Physics, and the project is about interference in Waves. We got a task, and I need to demonstrate how waves interfere with each other.

I got a demonstration with Lasers, how they split up, but I also need a much more simple demonstration. Something like when two water waves hit each other. I have been thinking of having a bowl of water, and then makes wave in it, but you can barely see the waves.

So, do anyone know how to make a good homemade demonstration of waves? Must be something as thick that you can see it easily, as water is to thin. I have basic school lab equipment available, as well as householding equipement.

Thx in advance!

 

[Delphi51]

It shows up well in ripple tanks. That's a shallow tank on legs with a bright light above, projecting the waves (which focus the light) on the table under the tank. Every high school lab has at least one. The tank is usually about half a meter square. You might manage with a smaller plastic storage container from your local bargain store.

I have seen some fabulous examples in nature, usually where a stream flows into a shallow lake. A natural ripple tank.