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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. - Science and Technology

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प्रश्न

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.

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उत्तर

In Vijaypur, Karnataka, there is an ancient site called Golghumat. The inside of its big circle is smooth and round, with a cap on top of it. Since the structure is circular, sound waves that start at one point are mirrored many times before going back to the same point, where they are heard more than once. 

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अध्याय 12: Study of Sound - Exercise [पृष्ठ १३७]

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बालभारती Science and Technology [English] 9 Standard Maharashtra State Board
अध्याय 12 Study of Sound
Exercise | Q 3. b. | पृष्ठ १३७

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?


The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.


Which property of sound leads of the formation of echoes ?


Name three devices which work on the reflection of sound.


What is the other name of a loud-hailer ?


Name the device which is used to address a small gathering of people.


On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.


Why do we hear more clearly in a room with curtains than in a room without curtains ?


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 ?


What is the minimum distance in air required from a sound reflecting surface to hear an echo (at 20°C) ?


The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method ?


Explain by giving a scientific reason.

We cannot hear the echo produced in a classroom. 


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? 


A man is standing between two vertical walls 680 m apart. He claps his hands and hears two distinct echoes after 0.9 seconds and 1.1 seconds respectively. What is the speed of sound in the air?


State two conditions necessary for hearing an echo.


______ allows bats to navigate through dark caves and find insects for food.


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


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