In ancient India, dome shaped courts were built in forts to allow even the faintest of sounds to be heard from far away. Which statement best explains this effect?
Dome increases the frequency of the sound so it becomes louder.
Dome absorbs high frequency sound and re-emits it at a high amplitude.
Dome focuses the reflected sound and multiple reflected waves reinforce at listener's position.
Dome traps air thereby increasing air pressure resulting in amplification of sound.
Sound
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Question

In ancient India, dome shaped courts were built in forts to allow even the faintest of sounds to be heard from far away. Which statement best explains this effect?
Dome increases the frequency of the sound so it becomes louder.
Dome absorbs high frequency sound and re-emits it at a high amplitude.
Dome focuses the reflected sound and multiple reflected waves reinforce at listener's position.
Dome traps air thereby increasing air pressure resulting in amplification of sound.

Sound

1 Like

KnowledgeBoat · Accepted Answer

Dome focuses the reflected sound and multiple reflected waves reinforce at listener's position.

Reason — In dome-shaped courts, sound waves produced at one point undergo multiple reflections from the curved surface of the dome.

Due to the geometry, these reflected waves tend to converge or focus at specific locations, so several waves reach the listener together which causes reinforcement of sound, making even faint sounds clearly audible over a distance.

Physics

Sound

Answer

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The diagram shown below depicts a displacement time graph of particle a wave travelling with speed 20 m/s.
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A girl claps in a classroom but is unable to hear an echo. Which option best explains the reason for the same ?
There is no reflection of sound from the walls.
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Answer

Related Questions

The diagram shown below depicts a displacement time graph of particle a wave travelling with speed 20 m/s.The frequency of the wave is :50 Hz33.3 Hz100 Hz1000 Hz

A girl claps in a classroom but is unable to hear an echo. Which option best explains the reason for the same ?There is no reflection of sound from the walls.Sound waves are completely absorbed by the walls.Echo returns in less than 0.1 s.Echoes require sounds of ultrasonic frequency.

The diagram shown below depicts a displacement time graph of particle a wave travelling with speed 20 m/s.
The frequency of the wave is :
50 Hz
33.3 Hz
100 Hz
1000 Hz

A girl claps in a classroom but is unable to hear an echo. Which option best explains the reason for the same ?
There is no reflection of sound from the walls.
Sound waves are completely absorbed by the walls.
Echo returns in less than 0.1 s.
Echoes require sounds of ultrasonic frequency.