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Physics2011

Notes for words test

AnswerQuestion
Angle of Reflection The angle between the reflected ray and the normal drawn to the point of incidence.
Audio Range The audio range of frequencies between 20 to 2000 hertz
Amplitude The maximum displacement of a wave measured from its equilibrium or undisturbed position.
Angle of Refraction The angle between the refracted ray and the normal drawn to the point of refraction.
Angle of Incidence The angle between the incident ray and the normal drawn to the point of incidence.
Beat .... interference effect....
Circular Propagation the propagation of the advancing circular wav lie along radial lines away from the center of disturbance.
Compression The region of a longitudinal wave in which the distance separating the vibrating particles is less than their equilibrium distance.
Constructive Interference- When 2 standing waves approach each other on the same side of the equilibrium line
Damping The reduction in the amplitude of a wave due to the dissipation of wave energy.
Diffraction The spreading of a wave disturbance into a region behind an obstruction.
Destructive Interference 2 standing waves approach each other on different sides of the equilibrium
Doppler effect The change observed in the frequency with which a wave from a given source reaches an observer when the source and the observer are in relative motion.
Frequency The number of complete cycles per unit of time.
Fundamental The lowest frequency of sound produced by an instrument.
Harmonic The fundamental and the tones of frequencies are whole number multiplies of the fundamentals.
Interference Refers to what happens when 2 waves pass through the same region of space at the same time.
Infrasonic Vibrations in matter below 20 hertz.
Incidence an approaching wave.
Intensity The power transferred across a unit area perpendicular to the direction of energy flow.
Loop A midpoint of a vibrating segment of a standing wave.
Longitudinal Wave A wave in which the vibrations are parallel to the direction of propagation of the wave.
Law of Reflection When a wave disturbance is reflected at the boundary of a transmitting medium the angle or incline is = to the angle of reflection.
Node A point of no disturbanc in a standing wave.
Pulse Wave Wave that consists of a few disturbances ex. shock wave
Production of Sound 1. Compression waves propagate as longitudinal disturbances 2.The disturbances consist of compression and rarefaction 3. Theses disturbances give rise to elastic forces in the propagating medium 4. The particles of the medium acquire energy from the vib
Periodic Wave The motions are repeated at regular intervals.
Period The time for one complete cycle.
Refraction The bending of a wave disturbance as it passes obliquely from one medium into another.
Reflection The return of a wave from the boundary of a medium.
Rarefaction The region of a longitudinal wave in the vibrating particles is farther apart than their equilibrium distance.
Ray A line drawn in the direction perpendicular to the wave front.
Resonance The incducing of vibrations of a natural rate by a vibrating soruce having the same frequency.
Rectlinear Propagation The propagation of the advancing straight wave is perpendicular to the wave front.
Sonic Spectrum The frequency range of sound.
Simple Harmonic Motion Motion in which the acceleration is proportional to the displacement from an equilibrium position and is directed toward that position.
Standing Wave The resultant of 2 wave trains of the same wavelength frequency and amplitude traveling in opposite directions through the same medium.
Sound The series of disturbances in matter to which the human ear is sensitive. Also similar disturbances in matter above and below the normal range or human hearing.
Superposition Combing the displacements of two or more waves vectorially to produce a resultant displacement.
Ultrasonic Vibrations in matter above 20000 Hertz.
Wave Trough The bottom part of a wave.
Wave length The distance between any two successive idenical points on a wave.
Wave Front The portions of the medium surface in which particles are in the same motion.
Wave Crest The top part of a wave.
Wave A distance that propagates through a medium or space.
Transverse Wave A wave in which the vibrations are at right angles to the direction of propagation of the wave.
Created by: cedmond
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