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प्रश्न
When sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound remain the same. Do you hear an echo sound on a hotter day? Justify your answer.
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उत्तर
Echo of sound is heard with less velocity and intensity on a hotter day. Because the velocity of sound is directly proportional to the temperature of the air. On a hotter day temperature will be higher so the velocity of sound will be changed by higher values.
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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?
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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?
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Name any two objects which are good reflectors of sound.
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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.
Answer the following question in your own words.
What should be the dimensions and the shape of classrooms so that no echo can be produced there?
