A continuous disturbance is created on the surface of water in a ripple tank with a small piece of cork floating on it. Describe the motion of the cork . What does the motion of the cork tell about the disturbance?

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Solution

The cork will move up and down at the same place while the waves will travel outwards from
the point of disturbance. Thus, the cork is not carried away by the waves. The motion of the cork tells us that particles of medium are vibrating at right angles to the direction of wave propagation. It also tells us that in a wave there is a propagation of energy and not matter

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