Tuning Fork
If an object vibrates, it can produce sound
We can see how sound is produced by such
vibrations using Tuning Fork
Tuning Fork is made of metal with a base and
two arms. When the arm hits a hard rubber piece with the help of the base, the
arms start vibrating i.e. they start moving back and forth periodically.
Such continuous very fast periodic motion of
the arms creates a series of compressions and rarefactions in the air and
spreads far from the source. This is what we call a sound wave.
The speed of sound in
each tuning fork is different because the length of its arm is different and
the frequency of the sound wave changes due to this.
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