waves

Pulse

Single, isolated disturbance that travels through a transmutation medium

Pulse length

Distance between the start and end of the pulse

Amplitude

Maximum displacement of the medium from its position of rest

Transverse pulse

Displacement of the particles of the medium is perpendicular to the direction of the movement of the pulse

Pulse speed

Distance pulse covers in one second

Destructive interference

Two pulses meet on opposite sides resulting h. A smaller amplitude

Constructive interference

Two pulses meet resulting in a greater amplitude that the originals

Crest

Highest point from rest position

Trough

Lowest point from rest position

Wave

Series of pulses

Transverse wave

Particles of a medium vibrate perpendicular to the direction of motion of the wave

Wavelength

Distance between two consecutive points in a phase (crest and trough )

Frequency

Number of waves per second

Period

Time taken from wine complete wave to pass a point

Wave speed

Distance travelled by a point in the wave per unit time

Longitudinal wave

Particles of the medium vibrate parallel to the direction of movement of the wave

Compression

Region of high pressure and particles (in the medium) are close

Rarefaction

Region of low pressure and particles (in the medium) are far apart

Sound

(Longitudal wave) protested by vibrations and therefore need a medium to propagate the sound

Reflection

Echoes, sound is reflected off a surface far away , always softer

Pitch

How high or low a note sounds

Loudness

Measured in db(decibels)