A wave in which the particles of the medium vibrate back and forth
in the same direction in which the wave is moving is called a longitudinal
wave.
A wave in which the particles of the medium vibrate up and down
perpendicular to the direction, in which the wave is moving, is called a transverse
wave.
Transverse
waves can be produced only in solids and liquids but not
in gases.
The distance between two consecutive crests or two
consecutive troughs of transverse wave is called wavelength.
Denoted by lambda (λ). Unit is meter.
The maximum displacement of the
particles of the medium from their original undisturbed position is called amplitude
of the wave.
The time taken to complete one vibration is called time
period.
The number of complete wave produced in one second
is called frequency of the wave. OR
The number of vibration per second is called frequency.
The distance traveled by a wave in one second is called velocity.
1 hertz is equal to 1 vibration per second.
The characteristic of sounds by which a shrill sound can be distinguished from
a grave one is called pitch of the sound.
The frequency of the voice of ladies and children is greater
than that of men.
A human ear can hear a sound only if its frequency lies between 20Hz and
20000Hz.
Sound waves are………………………
a) Longitudinal
b) Transvers
c) X-rays
d) Electromagnetic
A human ear can hear a sound only if its frequency lies between……….. NTS PST15/12/2019 (3:00) a) 20-----300 Hz b) 20----20,000 Hz c) 2------20 HZ d) 20----2000 Hz
The maximum displacement of the particles of the medium from their original undisturbed position is called……………….. a) Pitch b) Time period c) Frequency d) Amplitude
