# Shared Flashcard Set

## Details

Simple Harmonic Motion vocab
n/a
41
Physics
04/13/2009

Term
 Frequency
Definition
 number of complete cycles per time period (seconds is standard)
Term
 Period
Definition
 time required to complete a cycle (seconds)
Term
 Wave
Definition
 Moving oscillations, periodic disturbances; don't carry matter, but do carry energy
Term
 Wave pulse
Definition
 a single wave "bump"
Term
 Amplitude
Definition
 Greatest distance from the equilibrium point; the maximum displacement of a periodic wave
Term
 Crest
Definition
 high point of a wave
Term
 Trough
Definition
 low point of a wave
Term
 Wavelength
Definition
 The distance between corresponding points on two successive crests
Term
 Reflection
Definition
 When waves bounce off of barriers such that angle of incidence equals angle of ___________
Term
 Refraction
Definition
 When a wave enters a new medium, it may change speed and/or often direction (depending on the angle of incidence)
Term
 Diffraction
Definition
 when waves spread as they travel and encounter objects, moving around those objects
Term
 Constructive interference
Definition
 When two waves overlap so that the crests (or troughs) line up and create a new displacement larger than either original crest (or trough)
Term
 Destructive interference
Definition
 When two waves overlap so that a crest and a trough line up and cancel each other out, resulting in no displacement
Term
 Transverse waves
Definition
 waves with a hill/valley shape, displacement of the wave is perpendicular to the direction the wave is traveling
Term
 Longitudinal waves
Definition
 compression waves; vibrations travel in the same direction as the waves length
Term
 Forced vibration
Definition
 the vibration resulting from the application of an external periodic force.
Term
 Resonance
Definition
 a vibration of large amplitude produced by a relatively small vibration near a natural frequency of an object
Term
 Resonant Frequency
Definition
 The frequency at which an object starts to oscillate
Term
 Natural frequency
Definition
 the frequency that an object resonates at if not affected by external forces
Term
 Pulse
Definition
 periodic vibration
Term
 continuous wave
Definition
 a wave with a constant amplitude and frequency
Term
 periodic wave
Definition
 a wave with a non constant amplitude and/or frequency
Term
 Propagation
Definition
 The process through which a wave is transmitted through a medium
Term
 Propagation speed
Definition
 The speed of a wave, wave velocity
Term
 Medium of propagation
Definition
 the medium through which a wave travels
Term
 Compression/Condensation
Definition
 The part of a wave where molecules are more dense due to the movement of the wave
Term
 Rarefaction
Definition
 The part of a wave where molecules are less dense due to the movement of the wave
Term
 wave front
Definition
 an imaginary surface joining all points in space that are reached at the same instant by a wave
Term
 Ray
Definition
 an imaginary line in the direction a wave/wave front is traveling
Term
 Normal line
Definition
 An imaginary line perpendicular to a surface, against which angles of incidence, reflection, and refraction are measured
Term
 Angle of incidence
Definition
 The angle at which a wave hits a barrier or new medium; measured against the normal line
Term
 Angle of reflection
Definition
 The angle at which a wave bounces off of a barrier; measured against the normal line
Term
 Angle of refraction
Definition
 The angle of the direction change when a wave enters a new medium; measured against the normal line
Term
 Principle of superposition
Definition
 states that when the paths of waves intersect, the vector displacements (of the crests and troughs of each wave) add
Term
 Node
Definition
 A point on a standing wave where there is no displacement
Term
 Antinode
Definition
 a point on a standing wave at which maximum displacement occurs
Term
 Standing wave
Definition
 a wave that remains stationary due to interference between waves traveling in opposite directions
Term
 Fundamental frequency
Definition
 The lowest frequency of a given object at which a standing wave can be achieved
Term
 overtone
Definition
 any frequency above the fundamental frequency at which standing waves can be achieved
Term
 hertz
Definition
 unit of frequency
Term
 Harmonic
Definition
 any of a series of musical tones whose frequencies are integral multiples of the frequency of a fundamental
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