Q. Define Waves and explain how are waves formed by rope, slinky and ripple tank.

 Waves or Wave Motion:

A method to transport energy from one point to another point without transfer of matter is called wave.

Formation of Waves:

When particles of a medium are disturbed then as a result this disturbance travels from one point to another so by this mechanism energy is transported from one point to another. For Example.

1. Waves in Rope or String       2. Waves in a Slinky Spring     3. Water waves in Ripple Tank

1. Wave Motion by using a Rope:

We can produce waves on a rope by attaching one end on a wall or tree and continuously moving the other end up and down. as shown in figure . These up-and-down movements produce oscillations or vibrations. We can observe that the generated rope waves travel towards the wall or tree, whereas the rope itself moves only up and down. The rope is the medium through which the waves travel or propagate.

2. Waves in a slinky spring:

 A slinky spring is a pre-compressed helical or coiled spring, as shown in figure . We can perform several experiments with in the laboratory to understand the phenomenon of different types of wave motion. Attach one end of the spring with a wall. Now moving the free end of the slinky horizontally left and right continuously on the table will be able to see the coils of the spring moving left and right, whereas humps travel to the other end.

3. Water wave in (Ripple Tank):

 A ripple tank is a shallow glass tank of water used to demonstrate the basic properties of waves. It is a particular type of wave tank. The ripple tank is usually illuminated from above so that the light shines through the water to visualize the wave being produced. In the laboratory, we can produce water waves with the ripple tank. In the ripple tank, a small vibrator moves up and down the water surface, resulting in the water particles at the surface that are in contact with the dipper being made to move up and down. This up and down motion soon spread to other parts of the water .surface in the tank in the form of ripples. Here the water is the medium through which the ripples travel or propagate.