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# HarmonicMotion/Waves

TermDefinition
Harmonic Motion motion that repeats itself
harmony means "multiples of"
cycle the unit of harmonic motion that repeats itself over and over again
oscillator a system that show harmonic motion
period the amount of time for one cycle; measured in seconds
frequency the amount of cycles in one secondH
Hertz the unit for frequency
amplitude how big one cycle is or the height of a wave
damping the gradual loss of amplitude of a wave or oscillator due to friction
wave a traveling disturbance that transfers energy
crest the highest point of a transverse wave
trough the lowest point of a transverse wave
wavelength the distance between successive points on a wave; measured crest to crest or trough to trough
transverse waves that vibrate perpendicular to the motion that they travel
longitudinal waves that vibrate in the same direction as their motion
compressions parts of a longitudinal wave where the molecules come close together and the most energy
rarefactions parts of a longitudinal wave where the molecules move apart and the least energy
medium the material through which waves can move through which can be a vacuum, solid, liquid, or gas
mechanical wave wave that requires a medium to move thorugh
non-mechanical wave wave that does not require a medium to travel through (also known as electromagnetic waves)
wave interference the phenomena that results from the interaction of two or more waves
constructive interference when two waves interfere to create a larger wave
destructive interference when two waves interfere to create a smaller wave or cancel out
in-phase when two waves' crests and troughs match up and the waves are in time with each other
out-of-phase when two waves' crests and troughs do not match up and the waves are in not time with each other
natural frequency the frequency at which an object naturally vibrates
fundamental the first harmonic, or natural frequency, of a wave
harmonic a multiple of a wave's or object's natural frequency
standing wave a wave that occurs when it is trapped by a fixed end or stationary boundary
node locations on a standing wave that do not move
antinode locations on a standing wave that move the most
resonance when one object vibrating at the same natural frequency of a second object forces the second object into vibrational motion
reflection when a wave bounces off an obstacle
image the result of light reflecting
echo the result of sound reflecting
refraction when a wave bends when it crosses a boundary at an angle
diffraction when waves bend around corners or passes through an opening
absorption when the amplitude of a wave gets smaller and smaller as it passes through a material
Created by: holtzmanscience

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