derive minimum distance to hear echo
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The minimum distance required for an echo to be produced is 16.6 m. Consider an observer producing a sound at a distance x from a rigid surface. The person hears the first sound as soon as it is produced and next when it travels through a total distance of 2x i.e. (x+x) for approaching the surface and...
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Echo➫ A repetition of the original sound heard after the sound is reflected from a distant, dense & rigid object.
Ex:- When we shout in front of a High Mountain or Deep Valley.
➧Derivation 0f An Echo (Minimum Distance):-▬▬▬▬▬▬▬▬▬▬▬▬☟
Speed = Distance Travelled / Time Taken
➧ Speed 0f Sound = 344 m/s
(at 22◦C in Air)
➧ Time Taken = 1/10
(Persistence 0f Hearing)
➧ Distance Travelled = ?
❱ Now, Put the Above Formula,
344 m/s = Distance / 1/10 sec
D = 344 × 1/10
= 34.4 m
= 34.4 m / 2
= 17.2 m ...✔
_________ Thanks...✊
Echo➫ A repetition of the original sound heard after the sound is reflected from a distant, dense & rigid object.
Ex:- When we shout in front of a High Mountain or Deep Valley.
➧Derivation 0f An Echo (Minimum Distance):-▬▬▬▬▬▬▬▬▬▬▬▬☟
Speed = Distance Travelled / Time Taken
➧ Speed 0f Sound = 344 m/s
(at 22◦C in Air)
➧ Time Taken = 1/10
(Persistence 0f Hearing)
➧ Distance Travelled = ?
❱ Now, Put the Above Formula,
344 m/s = Distance / 1/10 sec
D = 344 × 1/10
= 34.4 m
= 34.4 m / 2
= 17.2 m ...✔
_________ Thanks...✊
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