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प्रश्न
Explain why, a ringing bell suspended in a vacuum chamber cannot be heard outside.
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उत्तर
A ringing bell suspended in a vacuum chamber cannot be heard outside because sound wave is an example of mechanical wave and requires material medium for its propagation. Therefore, sound waves cannot travel through vacuum.
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संबंधित प्रश्न
Describe an experiment to show that sound cannot pass through vacuum.
Fill in the blank and explain.
Sound does not travel through ______.
Give scientific reasons:
As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.
Explain the experiment, with a neat diagram, to prove the following:
'Sound needs material medium for propagation.'
A boy fires a gun and another boy at a distance hears the sound of fire 2.5s after seeing the flash. If the speed of sound in air 340 m/s, find distance between the boys.
Assuming the speed of sound in air equal to 340 m/s and in water equal to 1360 m/s, find the time taken to travel a distance 1700 m by sound in (i) air (ii) water.
Name the Sound of the Frequency Given Below:
2000 Hz
Name the Sound of the Frequency Given Below:
45 kHz
Sound cannot travel in ______.
The amount of water vapour present in the air is known as ______.
