waves

what is a period

time in which a particle of the medium completes one oscillation

what is frquency

number of complete waves passing a point per second

what is wavelength

distance travellled by the wave in the time in which a particle medium completes one oscillation

what is velocity

distance travelled by the wave in one second

what is displacement

distance moved by the wave in one second

what is amplitude

maximum displacement of a particle of the medium from its mean position

what is a phase

position of a particle of the medium within the cycle of oscillation

unit for period

seconds

unit for frequency

hertz

unit for wavelength

metres

unit for velocity

metres per second

units for displacement

metres

units for amplitude

metres

units for phase

angles in radians

what is the phase difference between particles which are a wavelength apart

2 (pi) radians

what is a progressive wave

wave in which energy is trasnferred from one place to another as a result of its motion

how is energy transferred by a wave

through ossilation

what is a mechanical wave

vibrations of particles of a medium

what type of waves don’t need particles to move

electromagnetic waves

what is the wave equation in words with frequency

velocity = frequncy x wavelength

what is the wave equation with time period

velocity = wavelength / time period

how do you calculate time period

1 / frequency

what is intensity

rate of energy transmitted per unit area at right angles to the wave

what is the formula for intensity

Amplitude²

what is a transverse wave

particles of a medium vibrating at right angles to the direction fo motion

what is a longitudinal wave

particles of a medium vibrating parallel to the direction of the motion

when a transverse wave moves forward, what does it form

crests and troughs

when a longitudinal wave travels forward, what does it form

compressions and rarefractions

what is a refraction

change in speed, wavelength, direction that occurs when a wave goes rfom one medium to another

what is diffraction

bending of waves as they pass around sharp corners or narrow openings

what is superposition

combining waves togehter in such a manner as to cause either construcive or destructive effects

what effect is consisdered reinforcing on superposition

constructive

what efffect is considered canceling in superposition

destructive

what is a standing wave

wave that remains in a fixed position

how can a standing wave be achieved

through reflection of the same wave

how do standing waves occur

two exactly the same waves travelling in opposite directions towards eacih other

what is a node

points on standing waves which are stationary with zero amplitude

what are antinodes

points with maxiumum amplitude

what is the unit for intensity

W m^-2