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प्रश्न
What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?
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उत्तर
The minimum distance in air required from a sound-reflecting surface to hear an echo at 20°C is 17.2 m.
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संबंधित प्रश्न
What is meant by an echo?
Which property of sound leads of the formation of echoes ?
Name the device which is used to address a small gathering of people.
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
What is an echo ? How is echo formed ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
Answer the following question in your own words.
Study the construction of the Golghumat at Vijapur and discuss the reasons for the multiple echoes produced there.
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.
Answer the following question in your own words.
What factors are important to get a distinct echo?
