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प्रश्न
Name the waves used for sound ranging. State one reason for their use.
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उत्तर
Ultrasonic waves are utilized for sound ranging because they are able to travel a great distance without deviating, are difficult to absorb in a medium, and can be focused into a tight beam.
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संबंधित प्रश्न
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
Which wave property determines loudness?
The flash of a gun is seen by a man 3 seconds before the sound is heard. Calculate the distance of the gun from the man (Speed of sound in air is 332 m/s).
In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below :
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200 Hz.
(a) What happens to the air in-between Anhad and the loudspeaker ?
(b) Explain how Anhad receives sound in both ears.
How does the velocity of a wave vary with temperature?
How does the frequency of sound given by a stretched string depend on its
- length,
- tension?
How is sound produced?
How do the following factor affect the speed of sound in air?
Temperature of air
High-frequency sounds that cannot be heard by you are called _______.
