Q. 63 A4.3( 12 Votes )
What is an echo? How is echo formed?
Answer :
The repetition of sound wave caused by the reflection of sound wave is called echo. For an echo to happen it requires a hard surface like a tall brick wall or clif to bounce the sound back.
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NCERT | Characteristics of a Sound Wave41 mins
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(a) What is an echo?
(b) How is an echo different from a reverberation?
(c) Describe an activity to demonstrate that sound follows the same laws of reflection as light.
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Describe two uses of multiple reflections of sound.
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Together with ScienceDefine reverberation.
Together with ScienceAn echo is returned in 6 seconds. What is the distance of reflecting surface from source? [given that speed of sound is 342 m/s.]
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Lakhmir Singh & Manjit Kaur - Physics