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Waves

Waves Study Guide

TermDefinition
Amplitude the maximum displacement of an energy wave from its rest position (middle) to its peak.
Compression area of a longitudinal wave where the particles are more densely clustered.
Compressional Wave Waves where particles of the medium only move in the same direction as the motion of the wave.
Constructive Interference the increase of energy when in-phase waves merge
Crest the point of a waves maximum displacement above the rest position
Destructive Interference when the crest of one wave passes through the trough of another wave
Diffraction the spreading out of light or sound waves after passing through an opening
Doppler Effect EITHER the source or the listener is moving to change the pitch or wavelength
Frequency number of wavelengths per second passing a point
Longitudinal Wave mechanical waves vibrating in the same direction as the wave motion
Medium the material through which a wave travels
Rarefaction the region of the lowest particle density in a longitudinal wave
Reflection the bouncing back of energy waves
Refraction the bending of waves by a change in speed
Transverse Wave a wave that is perpendicular (90 degrees) to the wave direction.
Trough the lowest point of maximum displacement in a transverse wave
Wave a repeating disturbance or movement that transfers energy
Wave length the length of a complete wave cycle from crest to crest
Wave energy determines how far a wave will travel
Light travels fastest through what medium? Gases
Speed travels faster in which mediums? Dense mediums like steel
Used to measure frequency Hertz
Wavelength is equal to? speed divided by frequency (hertz)
As the number of waves passing a point increases, what happens to the distance between each wave? Decreases
The shortest wavelength in electromagnetic radiation? Gamma rays
Electromagnetic wavelengths that are slightly longer than visible light Infrared waves
Which waves can cause sunburn and cancer? ultraviolet
Used to make internal images of the human body Ultrasound
Waves used for communication radio waves
This usually occurs inside a material rather than at the surface Absorption
the frequency at which a system oscillates when it is disturbed Natural frequency
The shorter the wavelength =______ hertz? greater
As the angle of incidence increases, what happens to the angle of refraction? It increases
Created by: FordLCHS