What is an echo what are the factors which it depends on?
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Explanation: Echo is a reflection of sound energy from distant surfaces or large objects, heard after the original sound.
Echo depends on distance of the reflecting surface and area of reflection.
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When a sound wave is reflected by some object then it is again heard by us this reflected sound is called echo. Velocity of sound waves depends on the temprature, pressure, humidity. In solids it also depends on Youngs Modulus, in liquids on bulk Modulus, in gases sound propagates adiabatically.
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