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प्रश्न
State two conditions for an echo to take place.
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उत्तर
- The reflected sound should reach the ear at least 0.1 s after the original sound.
- The reflecting surface should be sufficiently large and hard so that it can reflect sound effectively.
संबंधित प्रश्न
When sound travels in form of a wave
Explain the mechanism of the formation of a longitudinal wave when the source vibrates in the air.
State the factors that determine
(a) the pitch of a note.
(b) the loudness of the sound heard.
(c) the quality of the note.
If the amplitude of a wave is doubled, what will be the effect on its loudness?
Name the unit in which loudness of sound is measured.
Two identical guitars are played by two persons to give notes of the same pitch. Will they differ in quality? Give a reason for your answer.
Name the factors which determine the quality of a note.
How do you account for the fact that two strings can be used to give notes of the same pitch and loudness but of different quality?
How is it possible to detect the filling of a pitcher under a tap by hearing its sound at a distance?
______ is a general term for the distinguishable characteristic of a wave.
