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प्रश्न
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उत्तर
The audience in the auditorium as act obstructions in the path of sound waves; so they sound waves are not reflected much less and hence the echoes usually decrease.
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संबंधित प्रश्न
Define amplitude term in relation to a wave.
A wave passes from one medium to another medium. Mention one property of the wave out of speed, frequency or wavelength which does not change.
State two differences between the light and sound waves.
What adjustments would you make for tuning a stringed instrument for it to emit a note of a desired frequency?
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Write the approximate value of the speed of sound in water.
(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?
A sound wave whose frequency is 5000 Hz travels in air and then hits the water surface. The ratio of its wavelengths in water and air is ______.
What is meant by an echo? Explain.
