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प्रश्न
In a longitudinal wave, compression and rarefaction are formed.
विकल्प
True
False
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उत्तर
True.
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संबंधित प्रश्न
Name the factor that determines Quality of the note
State one important property of waves used for echo depth sounding.
A person is standing at the seashore. An observer on the ship which is anchored in between a vertical cliff and the person on the shore fires a gun. The person on the shore hears two sounds, 2 seconds and 3 seconds after seeing the smoke of the fired gun. If the speed of sound in the air is 320 ms-1 then calculate:
1) the distance between the observer on the ship and the person on the shore.
2) the distance between the cliff and the observer on the ship.
Which of the following determines the loudness of a sound wave?
Why is the loudness of sound heard by a plucked wire increased when mounted on a sound board?
Two waves of the same pitch have amplitudes in the ratio 1 : 3. What will be the ratio of their :
(i) intensities and
(ii) frequencies
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?
A 0.6 m long stretched wire is made to vibrate in two different modes as shown in figure
(a)
(b)
(i) If the frequency of the note produced in (b) is n, what is the frequency in case (a)?
(ii) In which case (a) or (b), is the note louder? Give reasons.
(iii) In which case is the pitch higher? Give reason.
Give a scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
Give a scientific reason.
We can hear the movement of a mosquito’s wings but we cannot hear the movement of our hands.
