When a wave hits a soft boundary.
When a wave hits a hard boundary.
When a wave goes around a corner.
When a wave bends from one medium to another (like from air to water).
When a wave gets to a hole in a wall.
When a wave goes from air to glass.
A carpet keeps a room quiet by:
Eyeglasses magnify objects by:
Light comes back from a mirror by:
If you look between your almost closed fingers and see dark lines, the lines are there because of:
Tile or marble floors make a room loud by:
Two waves that combine to make a bigger wave.
Two waves combine to make a smaller wave.
If you push a child on a swing and the child goes farther than before this is an example of:
A child is swinging on a swing and you push on them as they are coming toward you to slow them down.
Two waves that are 180o out-of-phase will make this:
Two waves that completely in-phase will make this: