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What is an echo ?...

What is an echo ?

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An echo is a repetition of sound produced by the reflection of sound waves from a wall, muntaion or other obstructing surface.
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PREMIERS PUBLISHERS-WAVES-OTHER IMPORTANT & QUESTIONS ANSWERS ( VERY SHORT ANSWER QUESTIONS. )
  1. What is the phase difference between the particles being on either sid...

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  2. Two sound waves produce 12 beats in 4 second. By how much do their fre...

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  3. What is an echo ?

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  4. What is progressive wave ?

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  5. List the condition for the constructive interference to take place.

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  6. List the condition for the destructive interference to take place.

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  7. What is the essential condition for the formation of beats ?

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  8. Distinguish between tone and a note.

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  9. What are harmonics ?

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  10. What are overtones ?

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  11. Define inverse square law of sound intensity.

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  12. What is the relation between loudness and intensity ?

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  13. What is meant by threshold of hearing ?

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  14. The wave which do not require medium for their propagation are known a...

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  15. In which type of media longitudinal waves can be transmitted ?

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  16. Which type of elesticity a medium must posses for transverse wave moti...

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  17. What is the difference between velocity and average velocity?

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  18. Does a vibrating body always produce sound ?

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  19. What is the phase difference between particles being on either side of...

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  20. Two sound waves produce 12 beats in 4 second. By how much do their fre...

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