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प्रश्न
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
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उत्तर
The person would hear echoes when talking in a bare room.
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संबंधित प्रश्न
Does sound follow the same laws of reflection as light does? Explain.
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 ?
What is the other name of a loud-hailer ?
Name the device which is used to address a small gathering of people.
Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.
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 are the medical applications of echo?
What is an echo? Write the conditions to hear an echo.
Answer the following question in your own words.
What factors are important to get a distinct echo?
