Advertisements
Advertisements
प्रश्न
Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.
Advertisements
उत्तर
The ceilings of the concert hall are made curved so that sound, after reflection from the ceiling, reaches all parts of the hall and the speech can be easily heard even by the person sitting at a considerable distance. The curved surface of the ceiling reflects the sound of the speaker toward the audience and hence prevents the spreading of sound in various directions. Due to this, sound is distributed uniformly throughout the hall and even the person sitting at the back of the hall can hear the speech easily.
APPEARS IN
संबंधित प्रश्न
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.
What is the other name of a loud-hailer ?
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
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 ?
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
What is the minimum distance needed for an echo?
How can you calculate the speed of sound using echo?
______ is an image obtained by the use of reflected ultrasonic waves.
