waves transfer energy and information without transferring matter
LONGITUDINAL WAVES TRANSVERSE WAVES
vibrations parallel to the direction of wave travel vibrations are at right angles to the direction of wave
(eg: sound waves) travel (eg: light waves)
AMPLITUDE
the height of the wave (in meters)
WAVEFRONT
surface containing points affected in the same way by
a wave at a given time
PERIOD OF A WAVE WAVELENGTH FREQUENCY
time to complete 1 wave length of one complete wave number of complete waves that pass a point in 1 sec
Wave Speed = frequency x wavelength (v = f×λ) frequency = 1 / time period (f = 1/T)
DOPPLER EFFECT
MOVING… PITCH FREQUENCY WAVELENGTH WAVE
closer to you increases increases decreases
further to you decreases decreases increases
WAVES CAN BE REFLECTED WAVES CAN BE REFRACTED
Reflection involves a change in direction of waves Refraction of waves involves a change in the direction
when they bounce off a barrier. of waves as they pass from one medium to another
LONGITUDINAL WAVES TRANSVERSE WAVES
vibrations parallel to the direction of wave travel vibrations are at right angles to the direction of wave
(eg: sound waves) travel (eg: light waves)
AMPLITUDE
the height of the wave (in meters)
WAVEFRONT
surface containing points affected in the same way by
a wave at a given time
PERIOD OF A WAVE WAVELENGTH FREQUENCY
time to complete 1 wave length of one complete wave number of complete waves that pass a point in 1 sec
Wave Speed = frequency x wavelength (v = f×λ) frequency = 1 / time period (f = 1/T)
DOPPLER EFFECT
MOVING… PITCH FREQUENCY WAVELENGTH WAVE
closer to you increases increases decreases
further to you decreases decreases increases
WAVES CAN BE REFLECTED WAVES CAN BE REFRACTED
Reflection involves a change in direction of waves Refraction of waves involves a change in the direction
when they bounce off a barrier. of waves as they pass from one medium to another
