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Question
Which property of sound leads of the formation of echoes ?
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Solution
Echoes are formed due to reflection of sound waves.
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RELATED QUESTIONS
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?
What is meant by an echo?
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.
State the laws of reflection of sound.
Answer the following question in your own words.
What is an echo?
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.
Answer the following question in your own words.
What factors are important to get a distinct echo?
Rohan conducted experiments on echo in different media. He observed that a minimum distance of 'x' meters is required for the echo to be heard in oxygen and 'y' meters in benzene. Compare 'x' and 'y'. Justify your answer.
Speed of sound in oxygen: 340 ms-1
Speed of sound in benzene: 200 ms-1
