Physics B- Unit 2 Key Terms 1 Flashcards

659931778	Amplitude	The distance from the midpoint to the maximum (crest) of a wave.
659931780	Antinodes	The positions on a standing wave where the largest amplitudes occur.
659931782	Blue shift	An increase in the measured frequency of light from an approaching source
659931784	Bow wave	the V-shaped wave produced by an object moving on a liquid surface faster than the wave speed.
659931786	Constructive interference	Addition of two or more waves when wave crests overlap to produce a resulting wave increased amplitude.
659931787	Crest	One of the places in a wave where the wave is highest or the disturbance is greatest.
659931789	Destructive interference	Combination of waves where crests of one wave overlap troughs of another, resulting in a wave of decreased amplitude.
659931791	Doppler effect	The change in frequency of a wave due to the motion of the source or of the receiver.
659931792	Frequency	The number of events per time; measured in hertz.
659931794	Hertz	The SI unit of frequency.
659931796	In Phase	Term applied to two or more waves whose crests and troughs arrive at a place at the same time, so that their effects reinforce each other.
659931797	Interference Pattern	A pattern formed by the overlapping of two or more waves that arrive in a region at the same time.
659931799	Longitudinal Wave	A wave in which the vibration is in the same direction as that in which the wave is traveling, rather than at right angles to it.
659931801	Node	Any part of a standing wave that remains stationary.
659931803	Out of Phase	Term applied to two waves for which the crest of one wave arrives at a point at the same time that a trough of the second wave arrives. Their effects cancel each other
659931805	Period	The time required for a pendulum to make one to-and-fro swing
659931807	Red Shift	A decrease in the measured frequency of light (or other radiation) from a receding source
659931809	Shock Wave	A cone-shaped wave produced by an object moving at a supersonic speed through a fluid.
659931811	Simple Harmonic Motion	Periodic motion in which acceleration is proportional to the distance from an equilibrium position and is directed toward that equilibrium position.
659931812	Sine Curve	A curve 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.
659931813	Sonic Boom	The sharp crack heard when the shock wave that sweeps behind a supersonic aircraft reaches the listener.
659931814	Standing Wave	Wave in which parts of the wave remain stationary and the wave appears not to be traveling.
659931815	Transverse Wave	A wave with vibration at right angles to the direction the wave is traveling
659931816	Trough	One of the places in a wave where the wave is lowest, or the disturbance is greatest, in the opposite direction of the crest.
659931817	Vibration	An oscillation, or repeating back and forth motion about an equilibrium position.
659931818	Wave	A "wiggle" in space and time.
659931819	Wavelength	The distance from the top of a crest of a wave to the top of the following crest.