are the vibration of particles. they need a medium to travel through
do not required a medium to travel through
the direction of vibration is perpendicular to the direction in which the wave is travelling
the direction of the vibration is parallel to the direction in which the wave is travelling
top of a wave
bottom of a wave
disturbance produced by one complite vibration of fhe source
is the distance from any point on one cycle to the corresponding point on the next cylce
the number of cycles passing any point per second
maximum distance of any particle from undisturbed position
is the apparent change in frecuency of waves due to the relative motion between wave source and observer
is when the direction of vibration of a wave is restricted to one plane
is the spreading out of a wave as it moves thorugh a gap