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प्रश्न
What is echo ?
एक पंक्ति में उत्तर
उत्तर
Echo is the sound heard after reflection from a rigid surface such as a cliff, a hillside, the wall of a building etc.
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Absorption of Sound
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संबंधित प्रश्न
Fill in the blank.
The sound heard after reflection is _______
Select the correct alternative:
The minimum distance required between the source and the reflector so as to hear the echo in air is
The outer case of the bell in a temple is made big. Give a reason.
What do you mean by reflection of sound ?
State one use of reflection of sound.
