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प्रश्न
What is longitudinal wave?
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उत्तर
The wave in which the particles of the medium vibrate about their mean positions in the direction of propagation of sound is called the longitudinal wave. Such a wave can be produced in solids, liquids, and gases.
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संबंधित प्रश्न
Loudness is determined by the __________ of vibration.
Name the unit in which the loudness of sound is expressed.
Name and define the characteristic which enables one to distinguish two sounds of same loudness, but of different frequencies, given by the same instrument.
State the factors that determine
(a) the pitch of a note.
(b) the loudness of the sound heard.
(c) the quality of the note.
Name the characteristic of the sound affected due to a change in its
(a) amplitude (b) waveform (c) frequency.
Figure shows four waves A, B, C, and D
Name the wave which shows
(a) a note from a musical instrument,
(b) a soft note
(c) a shrill note.
Give scientific reason for the following:
When a nail is hammering appears to get higher and higher in pitch.
Draw a diagram to show the waveforms of a pure note and a musical note, of the same pitch and same loudness.
The frequency of the stretched string of a fixed length is f when it is plucked in the middle. Where should it be plucked so that string vibrates with frequency (i) 2f, (ii) 3f?
Draw diagrams to show these vibrations and name them.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
