Wave Introduction
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Transcript of Wave Introduction
WaveIntroduction
WaveIntroduction
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What’s a Wave? What’s a Wave?
• A transfer of energy through a repetitive pattern of some sort
• Most waves involve the repetitive motion of particles (Matter)…
• …light is the exception.
• A transfer of energy through a repetitive pattern of some sort
• Most waves involve the repetitive motion of particles (Matter)…
• …light is the exception.
Mechanical WavesMechanical Waves• Transverse
• Wave particles move perpendicular to wave motion
• http://www.youtube.com/watch?v=UHcse1jJAto
• Compressional / Longitudinal
• Wave particles move parallel to wave motion
• http://www.youtube.com/watch?v=Rbuhdo0AZDU
• Transverse
• Wave particles move perpendicular to wave motion
• http://www.youtube.com/watch?v=UHcse1jJAto
• Compressional / Longitudinal
• Wave particles move parallel to wave motion
• http://www.youtube.com/watch?v=Rbuhdo0AZDU
Transverse WavesTransverse Waves• Light
• Stringed Instruments
• Water
• Sports
• Earthquake Secondary S-Wave
• Light
• Stringed Instruments
• Water
• Sports
• Earthquake Secondary S-Wave
Longitudinal WavesLongitudinal Waves• Sound
• Earthquake Primary P-Wave
• Sound
• Earthquake Primary P-Wave
FrequencyFrequency
• The number of wavelengths that pass a fixed point each second
• Measured in Hertz (Hz)
PeriodPeriod
• The amount of time it takes one wavelength to pass a point
• Measured in Seconds
RelationshipRelationship
Frequency Increases
Wavelength Decreases
Transverse Wave Parts
Transverse Wave Parts•Wavelength Wavelength ((λλ))
• Distance from point to Distance from point to next repeating point on next repeating point on wavewave
•CrestCrest• Part of wave above Part of wave above
equilibrium positionequilibrium position
•TroughTrough• Part of wave below Part of wave below
equilibrium position equilibrium position
•AmplitudeAmplitude• Distance fr. equilibrium to Distance fr. equilibrium to
max. or min. positionmax. or min. position
Longitudinal Wave Parts
Longitudinal Wave Parts•Wavelength Wavelength ((λλ))
• Distance from pt. to Distance from pt. to next repeating pt.next repeating pt.
•CompressionCompression• Part of wave where Part of wave where
particles are closeparticles are close
•RarefactionRarefaction• Part of wave where Part of wave where
particles are far apart particles are far apart
Wave SpeedWave Speed
AmplitudeAmplitude
• Energy carried by a wave
The greater the Amplitude
The more Energy the wave carries
• Compressional– based on how close coils are
• Transverse– based on height of wave
What type of wave is this?
What type of wave is this?