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प्रश्न
Write the answer in your own words.
Explain with the help of practical examples how sound is propagated through solids.
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उत्तर १
Sound is propagated in the form of waves in solids. It can be explained clearly from the below examples:
- Place your ear on one end of a long table. Ask your friend to tap the table from the other end. You can hear the produced sound. Sound reaches your ear after travelling through the table. This indicates that sound can travel through solids and in the form of waves.
- A stethoscope is another example of sound travelling through solids. Doctors use stethoscopes to listen to our heartbeat.
उत्तर २
Sound propagates with maximum speed through the solid medium. We can hear the sound of a train that is far off by placing our ear to the railway track. If we knock at the door. The person inside the room can hear it clearly.
संबंधित प्रश्न
Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of moon?
Sound travels in air :
How does the speed of sound in air vary with temperature?
How long will sound take to travel in (a) and iron rail and (b) air, both 3.3 km in length? Take speed of sound in air to be 330 m/s and in iron to be 5280 m/s.
How are bats able to avoid obstacles in their way?
The speed of sound is ______ in solids than in liquids
In any medium, as the ______ increases, the speed of sound also increases.
The amount of water vapour present in the air is known as ______.
The small to and fro motion is called vibration.
