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chp 15
vocab
31
Physics
10th Grade
04/02/2012

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Term
ripple
Definition
type of wave; distrubance that travel through water
Term
sound
Definition
disturbance travel in waves through air
Term
earthquake
Definition
disturbance that travel in sesmic waves
Term
sesmic waves
Definition
travel through earth
Term
mechanical wave
Definition
requires a medium through which to travel
Term
medium
Definition
physical enviorment which phenomena occur
Term
electrimagnic waves
Definition
oscillating electric and magnetic fields radiate outward at speed of light .
Term
energy
Definition
exert force over certain distance/work
Term
simple harmonic motion
Definition
mass bounce up and down or vibrates
Term
damped harmonic motion
Definition
vibration that fades out as energy is transfered from object to another
Term
transverse wave
Definition
motion of particles is perpendicular to motion of the wave
Term
longitudinal waves
Definition
cause particles in medium to vibrate parallel to direction of wave motion
Term
crest
Definition
highest point of transverse wave
Term
troughs
Definition
lowest point of transverse wave
Term
compressions
Definition
crowded area
Term
rarefactions
Definition
streached out areas
Term
reflection
Definition
bouncing back of a wave when meets surface or boundary
Term
diffraction
Definition
change in direction of wave through obstacle or eage
Term
interferance
Definition
combination of 1 or 2 more waves result in 1 wave
Term
constructive interference
Definition
2 or more waves produce same intensity of some 1 wave
Term
destructive interference 
Definition
2 or more waves prduce intesity equal to difference of 1 wave
Term
beats
Definition
alternating loud and soft sounds
Term
amplitude
Definition
maximun distance particles displace from normal resting position
Term
sine waves
Definition
waves shaped of a sine curve
Term
wave length
Definition
distance from any point of wave to identical point on next wave
Term
period
Definition
time that it takes a complete cycle/wave oscillation to occur
Term
frequency
Definition
# wave lengths that pass a point in a given time interval
Term
hertz
Definition
the number of vibrations per second
Term
wave speed
Definition
how fast a wave move 
Term
speed of light
Definition
 electroogamnetic waves in empty space travel at same speed
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