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Chapter 20 test

any disturbace that transmits energy through matter or empty space wave
does the material through which a wave travels move with the energy? no
what is the substance through which a wave travels? medium
do sound waves need a medium? yes
do eletrocmagentic waves need a medium? no
what are some examples of electromagentic waves? visible light, microwaves, x rays
what is the type of wave that moves in an up and down motion? transverse waves
highest point of a transverse wave? crest
lowest point of a transverse wave? trough
electromagnetic waves are --- waves transverse
what is the type of wave whose particles vibrate back and forth? logitudinal
places in a logitudinal wave where particles are crowded together compression
places in a logitudinal wave where particles are dispersed rarefaction
sound waves are --- waves logitudinal
surface waves are made up of --- and --- waves. logitudinal and transverse
the maximum difference that the particles of a wave's medium vibrate from their rest position amplitude
what is the rest position in a wave? the point where the particles of a medium stay with no disturbances
larger amplitude = --- (more or less) energy more
wavelength the distance between any two points next to each other on a wave
longer wavelength = --- (more or less) energy less
the number of waves produced in a given amount of time frequency
what is frequency measured in? Hertz (Hz)
higher frequency = (more or less) energy more
the speed at which a wave travels wave speed
what is the formula for wave speed? wave speed = wavelength x frequency
happens when a wave bounces back after hitting a barrier reflection
can all waves bee reflected? yes
what is a reflected sound wave called? echo
the bending of a wave as the wave passes from one medium to another at an angle refraction
when a wave enters a new medium, do the wavelength and wave speed often change? yes
the bending of waves around a barrier or through an opening diffraction
the result of two or more waves overlapping interference
construcive interference? when waves combine
destructive interference? when waves cancel each other out
a pattern of vibration that stimulates a wave that is standing still standing wave
the frequencies at which standing waves form resonant frequencies
Created by: kfran0112