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CPO Chapter 12 terms

Waves

QuestionAnswer
circular waves waves that move in concentric circles.
constructive interference occurs when waves add up to make a larger amplitude.
crest the high point on a wave.
destructive interference occurs when waves add up to make a smaller amplitude.
diffraction the process by which waves can bend around corners or pass through openings.
fundamental the name of the first harmonic.
hertz a unit of one cycle per second used to measure frequency; the abbreviation is Hz.
longitudinal wave a wave whose oscillations are in the same direction as the wave moves.
natural frequency describes how an object vibrates; for example
plane waves waves that move in straight lines.
reflection the bounce of a wave off a surface.
refraction occurs when light passes from one transparent material into another and bends.
resonance an occurrence whereby the natural frequency of a system is exactly in tune with a force applied to the system.
standing wave a wave trapped in one spot.
transverse wave a wave whose oscillation is perpendicular to the direction the wave travels.
trough the low point on a wave.
wavefronts another term used to describe the crests of a wave.
harmonic (1) frequencies that are multiples of fundamental notes; (2) multiples of natural frequency.
doppler effect An observed change in the frequency of a wave when the source or observer is moving
Created by: tjmelia
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