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प्रश्न
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
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उत्तर
Echoes are caused by the reflection of sound.
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संबंधित प्रश्न
An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m s−1?
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?
What is the other name of a loud-hailer ?
Name the device which is used to address a small gathering of people.
Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.
The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
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?
