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प्रश्न
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
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उत्तर
The bouncing back of sound when it strikes a hard surface is called reflection of sound. The reflecting surface should be hard and large for sound to reflect from it.
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संबंधित प्रश्न
Does sound follow the same laws of reflection as light does? Explain.
What is meant by an echo?
Which of the following statement best describes frequency?
Which property of sound leads of the formation of echoes ?
Name three devices which work on the reflection of sound.
Fill in the blank with suitable word :
An echo is simply a ................... sound.
To hear an echo, the minimum distance of the obstacle from the source of sound must be ______.
Assertion: The sound which we hear again is called Echo.
Reason: The sensation of sound (Echo) persists in our brain for about 1 s.
Numerical problems:
An echo returned in 3s. What is the distance of the reflecting surface from the source given that the speed of sound is 330 ms-1?
Answer the following question in your own words.
What factors are important to get a distinct echo?
