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प्रश्न
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संबंधित प्रश्न
Name two sound absorbing materials (or objects) which can make our big room less echoey.
What is a megaphone ? Name the principle on which a megaphone works.
What is a bulb horn ? Name the principle on which a bulb horn works.
Write the approximate value of the speed of sound in iron.
How are bats able to fly in the dark?
What do you understand by the ‘Echolocation system of Dolphins’?
(i) A man stands at a distance of 68 m from a cliff and fires a gun. After what time interval will he hear the echo, if the speed of sound in air is 340 ms−1?
(ii) If the man had been standing at a distance of 12 m from the cliff would he have heard a clear echo?
Explain why, the ceilings of concert halls are curved.
The direction of the incident sound, the direction of reflected sound, and the normal are in different Planes.
