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Waves on a slinky spring

To show examples of different waves, a "slinky" spring can be fixed at one end of a horizontal table.

A slinky spring (a type of spring which is long and easily stretched).
A slinky spring (a type of spring which is long and easily stretched).

Moving the free end of the spring back-and-forth in a direction perpendicular to its length produces transverse waves along the spring.

Moving the free end of the spring back-and-forth in a direction parallel to its length produces longitudinal waves along the spring.

View looking down on the table. Top: a slinky being used to make a transverse wave. Bottom: a slinky being used to make a longitudinal wave.
View looking down on the table. Top: a slinky being used to make a transverse wave. Bottom: a slinky being used to make a longitudinal wave.