## Waves~Unit Quiz 03/13/2012 Modified Pick Any 15

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dmoss Teacher on March 11, 2012

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# Waves~Unit Quiz 03/13/2012 Modified Pick Any 15

 CompressionsThe parts where the coils are close together in a longitudinal wave
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#### Definitions

Compressions The parts where the coils are close together in a longitudinal wave
Doppler effect Change in the apparent frequency of a wave as observer and source move toward or away from each other
Convex lens Lens such that a beam of light passing through it is brought to a point or focus, lens is thicker in the center
Concave lens A lens that is thinner in the center than at the edges, a lens such that a parallel beam of light passing through it is caused to diverge or spread out
Electromagnetic spectrum The complete range of electromagnetic wave frequencies and wavelengths
Surface waves Combination of transverse and longitudinal waves. The wave moves from one medium to another. EXAMPLE: ocean waves
Energy The ability to do work
Speed Speed=Wavelength xFrequency,Frequency=Speed/Wavelength,
Wavelength=Speed?Frequency
Frequency Is the number of complete waves that pass a given point in a certain amount of time
Longitudinal (compressional) wave The wave travels in the same direction as the disturbance
Amplitude The maximum height of a wave from its rest position;LARGE AMPLITUDE = MORE ENERGY; SMALL AMPLITUDE = LESS ENERGY
Wave length The distance between any two crests or compressions next to each other in a wave; SHORTER WAVELENGTH = MORE ENERGY; LONGER WAVELENGTH =LESS ENERGY
Electromagnetic waves Waves that transfer electric and magnetic energy through the vacuum of space.
Vacuum An empty area or space
Law of Reflection Angle of incidence = angle of reflection
Vibration A repeated back-and-forth or up-and-down motion
Interference The meeting and combining of waves
Rarefraction A decrease in wave density., Change in direction of a wave that causes particles to move back and forth along the direction the wave travels
Refraction A change in direction of a wave when it changes speed as it travels from one material to another.
Diffraction The bending of waves around a barrier or through an opening
Mechanical Wave A wave that requires a medium through which to travel
Medium The material through which a wave travels
Wave A disturbance that carries energy through matter or space.
Wavelength The distance between one point on a wave and the corresponding point on an adjacent wave (example :crest to next crest)
Trough The lowest point of a wave
Crest The highest point of a wave

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