Gentle tap on table cannot be heard to another person but can be heard by the person who has kept his ear on the table. Why?
Answers
Answer:
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Answer:
Sound is produced when something vibrates. Guitars and pianos produce sound when their strings vibrate. Drums make sound when their drumheads vibrate. And the sound of your favorite singer is produced when his or her vocal cords vibrate.
Sound doesn't just travel though air; it can travel through solids, liquids, and other gases too. When you tap the desk you cause the molecules in the desk to vibrate and the vibrations travel through the desk like they do through the air.
The molecules in solids are arranged differently than the molecules in gases and most of the time it's easier for sound waves to travel through solids. This means that the waves have more energy when they reach your ears – and more energy means a louder noise.