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# physics 25 test

### chapter 25 test vocab

vibration wiggle in time: does not move from place o place.
Waves wiggles in time and space
period time for one event s/w, T
simple harmonic motion The back and forth vibratory motion of a swinging pendulum
sine curve pictorial representation of a wave
crest higest part of the wave
troughs One of the lowest places on wave
amplitude the distance from the lowest or highest part of the wave to the equilibrium line.
wavelength the distance from crest to crest.
frequency the number of cycles in a period. measured in Hz or w/s
hertz the SI unit of frequency
transverse wave a wave with vibrations at right angles; examples are light and water
longitudinal wave a wave where the vibrations are going the same direction of the wave. example is sound
interference pattern a pattern formed by the overlapping of two or more waves (overlapping waves)
constructive interference addition of two or more waves when crests overlap which results in a lager amplitude
destructive interference combination of waves where crest meets trough which results in no wave
out of phase same as destructive interference
in phase same as constructive inteference
standing wave wave in which some parts of the wave are stationary and the wave appears to not be traveling. result of interference between orginal wave and a reflected wave
nodes any part of the wave that appears to be stationary
antinodes the positions on a standing wave where the largest amplitudes occur.
Doppler effect A change in frequency and it becomes louder or the frequency increases when it gets closer to u and then it decreases after it passes u. bluer light and redder light
bow wave A v-shaped wave produced by usually a boat moving faster than the wave speed. 2D and it is on the surface
shock wave a cone-shaped wave produced by an object moving at supersonic speed through a fluid. 3D in a medium example aircraft
sonic boom wave of pressed air that reaches a listener's ear.
Created by: lovesun593

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