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प्रश्न
Name the device which is used to address a small gathering of people.
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उत्तर
Megaphone or bullhorn is a device that is used to address a small gathering of people.
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संबंधित प्रश्न
Does sound follow the same laws of reflection as light does? Explain.
When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?
Which of the following statement best describes frequency?
Fill in the blank with suitable word :
An echo is simply a ................... sound.
Why do we hear more clearly in a room with curtains than in a room without curtains ?
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
Answer the following question in your own words.
What is an echo?
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.
How can you calculate the speed of sound using echo?
Assertion: The sound which we hear again is called Echo.
Reason: The sensation of sound (Echo) persists in our brain for about 1 s.
