Study guide Ch. 17 & 18 Waves, Light & EM Spectrum
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Mechanical Waves: a disturbance in matter that carries energy from one place to another
Transverse Waves: a wave that causes the medium to vibrate at right angles to the direction in which the wave travels.
Surface waves: a wave that travels along a surface separating two media
Longitudinal waves: a wave tin which the vibration of the medium is parallel to the direction to wave travels
Sound waves: longitudinal waves
Diffraction: the bending of a wave as it moves around an obstacle or passes through a narrow opening
Refraction: the bending of a wave as it enters a new medium at an angle.
Reflection: when a wave bounces off a surface that it cannot pass through
Crest: the highest point of the wave above rest position
Amplitude: the maximum displacement of the medium from rest position
Rarefaction: an area where the particles in a medium are spread out
Compression: an area where the particles of a medium are spaced close together
Trough: the lowest point of a wave below rest position.
Wavelength: the distance between a point on one wave and the same point on the next cycle of the
Frequency: the number of complete cycles in a given time
The Doppler Effect: a change in sound frequency caused by the motion of the sound source, motion of the listener, or both
Constructive interference: when two or more waves combine to produce a wave with a larger displacement
Destructive interference: when two or more waves combine to produce a wave with smaller displacements
Wave Calculation Equations: Draw all 4 triangles, be able to calculate answers like wkbk 4-51 to 4-54
Draw Figure 2 and label p. 501 here:
Draw and label figure 3...
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