click below
click below
Normal Size Small Size show me how
krafft chapt 25 vocb
Question | Answer |
---|---|
an oscillation, or repeating back and forth motion, about an equilibrium position. | vibration |
a disturbance that repeats regularly in space and time and that is transmitted progressively from one place to the next with no actual transport of matter. | wave |
the time required for a pendulum to make one to and fro swing (single cycle). | period |
the back and forth vibratory motion of a swinging pendulum. | simple harmonic motion |
a curse whose shape represents the crests and troughs of a wave, as traced out by a swinging pendulum that drops a trail of sand over a moving conveyor belt. | sine curve |
one of the places in a wave where the wave is highest or the disturbance is greatest. | crest |
one of the places in a wave where the wave is lowest, or the disturbance is greatest, in the opposite direction from a crest. | trough |
the distance from the midpoint to the maximum (crest) of a wave or, equivalently, from the midpoint to the minimum (trough). | amplitude |
the distance from the top of the crest of a wave to the top of the following crest, or equivalently, the distance between successive identical parts of the wave. | wavelength |
the number of events per time; measured in hertz (or events per time). Inverse of period | frequency |
the SI unit of frequency. One Hz is one cycle per second. | Hertz |
a wave with a vibration at right angles to the direction the wave is traveling. | transverse waves |
a wave in which the vibratio is in the same direction as that in which the wave is traveling, rather than at right angles to it | longitudinal waves |
a pattern formed by the overlapping of two or more waves that arrive in a region at the same time | interference pattern |
addition of two or more waves when wave crests overlap to produce a resulting wave of increased amplitude. | constructive interference |
combination of waves where crests of one wave overlap troughs of another, resulting in a wave of decreased amplitude. | destructive interference |
term applied to two waves for which the crest of one wave arrives at a point at the same time that a trough of he second wave arrives. Their effects cancel each other | out of phase |
term applied to two or more waves whose crest and troughs arrive at a lace at the same time, so that their effects reinforce each other. | in phase |
wave in which parts of the wave remain stationary and the wave appears not to be traveling. The result of interference between an incident wave and a reflected wave. | standing wave |
any part of a standing wave that remains stationary. | node |
the positions on a standing wave where the largest amplitudes occur. | antinode |
the apparent change in frequency of a wave due to the motion of the source or of the receiver. | doppler effect |
an increase in the measured frequency of light from an approaching source; called this because the apparent increase is toward the high frequency, or blue, end of the color spectrum. also occurs when an observer approaches a source | blue shift |
a decrease in the measured frequency of light or other radiation from a receding source; called this because the decrease is toward the low frequency, or red end of the color spectrum. | red shift |
the V-shaped wave produced by an object moving on a liquid surface faster then wave speed. | bow wave |
a cone shaped wave produced by an object moving at supersonic speed through a fluid. | shock wave |
the sharp crack heard when the shock wave that sweeps behind a supersonic aircraft reaches the listener. | sonic boom |