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Waves

TermDefinition
mechanical wave a disturbance in matter that transfers energy from place to place
medium another word for matter
transverse wave a wave in which the medium vibrates at right angles to the direction that the wave travels
S wave a transverse wave that occurs with an earthquake
longitudinal wave a wave in which the medium vibrates in the same direction that the wave travels
amplitude the height of each crest above the resting position
wavelength the distance between two adjacent crests
frequency the number of waves that pass a fixed point in a given amount of time
wave speed how far the wave travels in a given amount of time, such as how many meters it travels per second
reflection waves bounce back from a barrier they cannot pass through
refraction waves bend as they enter a new medium at an angle
diffraction waves spread out and travel around obstacles
constructive interference the crests of one wave overlap the crests of the other wave
destructive interference the crests of one wave overlap the troughs of another wave
voltage the push that gets electrons flowing in a current
ampere the System Internationale unit for current
decibel the unit of intensity
Doppler Effect a change in the frequency of sound waves, relative to a stationary listener, when the source of the sound waves is moving
loudness how loud or soft a sound seems to a listener
intensity a measure of the amount of energy in sound waves
pitch how high or low a sound seems to a listener
resonance when an object vibrates in response to sound waves of a certain frequency, causing constructive interference and an increase in amplitude
echolocation animals such as bats, whales, and dolphins send out ultrasound waves and use their echoes, or reflected waves, to identify the locations of objects they cannot see
sonar sound navigation and ranging
Created by: evolpe