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प्रश्न
Describe with diagram, how compressions and rarefactions are produced.
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उत्तर
Sound is also a longitudinal wave. Sound can travel only when there are particles which can be compressed and rarefied. Compressions are the regions where particles are crowded together. Rarefactions are the regions of low pressure where particles are spread apart. A sound wave is an example of a longitudinal mechanical wave. Below figure represents the longitudinal nature of sound wave in the medium.
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संबंधित प्रश्न
Which wave property determines pitch?
What type of wave is represented :
(a) by density-distance graph?
(b) by displacement-distance graph?
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Match the following.
| 1. | Tuning fork | The point where density of air is maximum |
| 2. | Sound | Maximum displacement from the equilibrium position. |
| 3. | Compressions | The sound whose frequency is greater than 20,000 Hz. |
| 4. | Amplitude | Longitudinal wave. |
| 5. | Ultasonics | Production of sound. |
Name three animals which can hear ultrasonic vibrations.
In longitudinal waves, the particle vibrates in a ______ direction of propagation.
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