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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
Can two person hear each other on moon’s surface ? Give reason to support your answer.
In which medium sound travels fastest : air, water or steel?
When we open a gas tap of a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?
The velocities of sound waves in four media P, Q, R and S are 18,000 km/h, 900 km/h, 0 km/h and 1200 km/h respectively. Which medium could be a liquid substance?
Fill in the blank and explain.
Sound does not travel through ______.
Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
Compare approximately the speed of sound in air, water and steel.
Sound in air propagates in form of
Can we hear sounds of frequencies:
More than 20 KHZ
The small to and fro motion is called vibration.
