Ch. 14 WavesCh. 14 WavesConcept ReviewConcept Review

Milbank High SchoolMilbank High School

Parts of a waveParts of a wave

Wavelength

AmplitudeOrigin

Crest

Trough

Parts of Wave - p.372Parts of Wave - p.372• Origin - the base line of the energy.Origin - the base line of the energy.• Crest - high point on a waveCrest - high point on a wave• Trough - Low point on a waveTrough - Low point on a wave• Amplitude - distance from origin to Amplitude - distance from origin to

crestcrest• Wavelength - distance from crest to Wavelength - distance from crest to

crestcrest• Wavelength is abbreviated by the Wavelength is abbreviated by the

Greek letter lambda = Greek letter lambda =

• Transverse WavesTransverse Waves SIMSIM

• AmplitudeAmplitude SIMSIM

Which one of these waves Which one of these waves has a larger amplitude?has a larger amplitude?

WavelengthWavelength•Wavelength (Wavelength (λ)λ)

– The distance from any point on The distance from any point on one wave to that same point on one wave to that same point on the next wavethe next wave

SIM

SIM2

λ

λ

Which one of these waves Which one of these waves has a larger wavelength has a larger wavelength ((λ)λ)??

FrequencyFrequency•FrequencyFrequency

– The number of waves (or cycles) The number of waves (or cycles) produced in a given amount of produced in a given amount of timetime

SIM

Which one of these waves Which one of these waves has a higher frequency?has a higher frequency?

ReflectionReflection

• ReflectionReflection– When a wave bounces back after When a wave bounces back after

striking a barrierstriking a barrierSIMSIM2

DiffractionDiffraction

• DiffractionDiffraction– The bending of waves around a barrier The bending of waves around a barrier

or through an opening.or through an opening.

SIM

SIM2

Sound waves are Sound waves are reflected at a reflected at a

boundary.boundary.

More Stuff…More Stuff…

• Points on wave don’t movePoints on wave don’t move

• What determines how much of a What determines how much of a wave is reflected?wave is reflected?