Q.5 Distinguish between progressive waves and stationary waves.
Best answer
Answer:
| Progressive waves | Stationary waves |
|---|---|
| 1. The disturbance travels forward; the wave advances through the medium. | 1. The disturbance does not advance; the wave stays confined to a region. |
| 2. Energy is transferred along the direction of propagation. | 2. No energy is transferred; it stays localised between nodes. |
| 3. All particles vibrate with the same amplitude. | 3. Amplitude varies from zero at nodes to maximum at antinodes. |
| 4. There are no points permanently at rest (no nodes or antinodes). | 4. Nodes (particles always at rest) and antinodes are formed. |
| 5. Phase changes continuously from particle to particle. | 5. All particles between two adjacent nodes vibrate in phase; particles in adjacent loops are in opposite phase. |
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