What is an echo? Under what conditions can it be heard?

Reflection of Sound Waves, Echo and Its Formation | PadhAiPro

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TextReflection of Sound WavesEcho and Its Formation

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Explain how 'echo' is produced.

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Reflection of Sound Waves

Echo and Its Formation

What should be the minimum distance between the listener and the reflector to hear an echo of sound propagating with a speed v m s⁻¹?

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Does the speed of sound increase or decrease on a hotter day? Justify.

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Establish the relationship between speed of sound, its wavelength and frequency. If speed of sound in air is 340 m s⁻¹, calculate.

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A girl is sitting in the middle of a park of dimension 12 m × 12 m. On the left side of it there is a building adjoining the park and on right side of the park, there is a road adjoining the park. A sound is produced on the road by a cracker. Is it possible for the girl to hear the echo of this sound? Explain your answer.

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Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved?

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