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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
The minimum distance between the source and the reflector in air. So that an echo is heard is approximately equal to ______.
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342 m/s, calculate the distance of the reflecting surface.
State the laws of reflection of sound.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
Answer the following question in your own words.
What is an echo?
State two conditions necessary for hearing an echo.
What are the medical applications of echo?
How can you calculate the speed of sound using echo?
______ allows bats to navigate through dark caves and find insects for food.
