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प्रश्न
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
उत्तर
Echoes are caused by the reflection of sound.
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संबंधित प्रश्न
Does sound follow the same laws of reflection as light does? Explain.
In which medium, air or water, an echo is heard much sooner ? Why ?
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 ?
Which of the following device does not work on the multiple reflections of sound waves ?
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?
What is the minimum distance needed for an echo?
______ allows bats to navigate through dark caves and find insects for food.
Assertion: The sound which we hear again is called Echo.
Reason: The sensation of sound (Echo) persists in our brain for about 1 s.
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?
