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Wavelengths
Vocab for chapter 1
14
Science
7th Grade
04/13/2011

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Term
crest
Definition
highest point or peak of a wave
Term
trough
Definition
lowest point or valley of a wave
Term
amplitude
Definition
distance a medium travels above or below its position at rest
Term
wavelength
Definition
distance from one wave crest or trough to the next
Term
frequency
Definition
number of wavelengths passing a fixed point in a certain amount of time
Term
wave
Definition
disturbance that transfers energy from one place to another
Term
medium
Definition
any substance a wave can travel through
Term
mechanical waves
Definition
waves that transfer energy through matter
Term
transverse wave
Definition
direction of wave is perpendicular (right angle) to direction of disturbance
Term
longitudinal wave
Definition
wave travels in same direction as disturbance
Term
refelction
Definition
bouncing back of a wave after it strikes a barrier
Term
refraction
Definition
bending of a wave as it enters a medium at an angle other than 90 degrees.
Term
diffraction
Definition
waves pass through an opeing they spread out
Term
interference
Definition
meeting and combining of waves
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