# Shared Flashcard Set

## Details

IB 4 Waves Definitions
IB Physics definitions for Unit 4: Waves
18
Physics
01/21/2021

Term
 OSCILLATION
Definition
 A repeated back and forth motion
Term
 CYCLE
Definition
 One complete oscillation
Term
 DISPLACEMENT (x)
Definition
 The distance of the oscillating object measured from its equilibrium position
Term
 AMPLITUDE (x0)
Definition
 The maximum displacement from the equilibrium position
Term
 FREQUENCY (f)
Definition
 The number of oscillations completed in a second
Term
 HERTZ (Hz)
Definition
 Unit of frequency. One oscillation in one second
Term
 TIME PERIOD (T)
Definition
 The time taken for an oscillation
Term
 FORMULA CONNECTING TIME PERIOD AND FREQUENCY
Definition
 [image]
Term
 PHASE DIFFERENCE (φ)
Definition
 Two oscillations which are not in step have a phase difference (expressed as an angle). A phase difference of one oscillation is 2π radians.
Term
 RESTORING FORCE
Definition
 The force directed towards the centre of the SHM which opposes the displacement at all times.
Term
 SIMPLE HARMONIC MOTION
Definition
 An oscillation in which the acceleration of a point is proportional to its displacement from equilibrium and is in the opposite direction.
Term
 TRAVELLING WAVE
Definition
 A cyclic disturbance moving away from a source and transferring energy.
Term
 MECHANICAL WAVE
Definition
 A wave that travels through a physical medium by oscillations of the particles. Its energy moves in the direction of the wave, but the particles move in a cycle.
Term
 WAVELENGTH
Definition
 The distance between consecutive points on the wave which are in step (ie in phase)
Term
 WAVE SPEED
Definition
 The speed of travel of the energy of the wave
Term
 TRANSVERSE WAVE
Definition
 Wave whose disturbance is perpendicular to the direction of travel of the energy of the wave.
Term
 LONGITUDINAL WAVE
Definition
 Wave whose disturbance is parallel to the direction of travel of the energy of the wave
Term
 MEDIUM
Definition
 The material in which the oscillations of a mechanical wave occur (eg sound in air; ripples on water). Electromagnetic waves require no medium.
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