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Waves Vocabulary

Science 9 Waves Terms

TermDefinition
Wave a repeated disturbance caused by energy traveling through matter or space
Medium the material the wave is traveling through
Mechanical Wave a kind of wave that requires a medium
Transverse Wave a wave where the matter moves in one direction (up and down) while the energy moves in another direction (side to side)
Longitudinal Wave or Compressional Wave a wave where the matter and the energy move in the same direction
Crest the high point of a transverse wave
Trough the low point of a transverse wave
Rest Position where the matter would normally be without the wave
Compression the part of a compressional/longitudinal wave that is close together
Rarefaction the part of a compressional/longitudinal wave that is far apart
Wavelength the distance from crest to crest or compression to compression (one wave cycle)
Frequency the number of waves that pass a point in one second
Amplitude the energy or intensity of the wave measured by the height of the transverse wave
Refraction when a wave bends as a changes mediums for example going from air to water
Diffraction when a wave bends around a small opening or object
Interference when two waves combine to form a new wave
Resonance when an object is caused by vibrate by absorbing energy at its natural frequency
Intensity amount of energy that flows through a certain area in a specific amount of time
Loudness human perception of sound volume (depends on intensity)
Decibel the units for loudness/ sound intensity
Pitch human perception of frequency
Doppler Effect the apparent change in frequency as the source of sound moves relative to the observer
Electromagnetic Wave a kind of wave that does not require a medium
Radio Wave the longest electromagnetic wave
Microwave an electromagnetic wave used in satellites and in microwaves
Infrared Light an electromagnetic wave used in remotes and that can be felt as heat
Visible Light the only electromagnetic wave that can be seen
Ultraviolet Light an electromagnetic wave used to sterilize objects and that is given off by the sun to cause sunburn/skin cancer
Xray an electromagnetic wave used by doctors
Gamma Ray the most powerful electromagnetic wave
Created by: kmsebastian