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Question 1: What is the difference between progressive and stationary waves?


S No Progressive Waves Stationary Waves
1 Progressive waves are the result of disturbance produced in a medium. The disturbance is transferred from one particle to another particle and the wave moves on. Stationary or standing waves are the result of superposition of two identical waves moving in opposite directions in a medium.
2 Progressive waves transmit energy from one point to another as they move on. Unlike progressive waves, stationary waves have no onward motion. Therefore, they do not transmit energy from one point to another.
3 The amplitude of vibration of each point is same. Unlike progressive wave, each particle has its own amplitude of vibration in stationary waves. At the node point, the amplitude is zero. Then it gradually increases as we go toward the anti-node, where it is maximum. It again starts decreasing as we go further toward the node.
4 Unlike stationary waves, there is no node or anti-node. Particles of the medium have similar motion. In stationary waves, we have nodes and anti-nodes. At nodes, the particles are static while at the anti-nodes, the amplitude of vibration is maximum.
5 Frequency of the progressive wave is equal to the frequency of the source producing them. Frequency of the stationary wave is equal to the frequency of the superposing waves.


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