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प्रश्न
Describe with the help of a diagram, how compressions and rarefactions are produced in air near a source of sound.
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उत्तर
Let us assume that a tuning fork is the source of sound.
- When it vibrates and moves forward, it pushes and compresses the air in front of it, thus creating a region of high pressure. This region is called compression (C).
- This compression moves forward away from the vibrating object, such as the tuning fork.
- When the arm of the tuning fork vibrates back inwards (backwards), a low-pressure region is created, which is called rarefaction (R).
- When an object vibrates this way, a series of compressions and rarefactions are created in the air. These compressions and rarefactions form sound waves, which propagate through the medium.
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