Wave Repeating disturbance or movement Carries energy through matter and space Vibrations Anything that moves in a rhythmic patter Up and down Back and forth What is a Wave All waves are produced when something vibrates ID: 803421
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Slide1
Waves
Chapter 10
Slide2Nature of Waves
Wave
Repeating disturbance or movement
Carries energy through matter and space
Slide3Vibrations
Anything that moves in a rhythmic patter
Up and down
Back and forthWhat is a Wave
All waves are produced when something vibratesPendulum
Slide4Mechanical Waves (2 types)
Transverse
Matter moves up and down perpendicular to the direction of wave motion
LightCompression (Longitudinal)
Matter moves parallel to wave motionSound
Slide5Wave Properties - Transverse
Slide6Wave Properties - Compression
Slide7Measuring Waves
Wavelength (m)
Distance between one point on a wave and the same point on the next wave
Frequency (1/s or Hertz)Number of wavelengths that pass a fixed point each secondHow fast the source vibrates
Relationship between frequency and wavelength is…
Slide8Wave Speed
Medium – matter through which a wave will travel
Speed of the wave depends on the medium
SoundLightTemperature also affects wave speed
Slide9Wave Speed Equation
Slide10Amplitude and Energy
Amplitude
Related to the amount of energy carried by the wave
Greater amplitude means…Transverse wave
Compression wave
Slide11Wave Behavior - Reflection
Wave strikes a boundary and bounces back off of it
Law of Reflection
Angle of incidence equals the angle of reflection
Slide12Wave Behavior - Refraction
Bending
of a wave as it passes from one medium to another
Caused by a change in wave speed
Slide13Wave Behavior - Diffraction
Change in direction of a wave as it bends around an object
Slide14Wave Behavior - Interference
Two or more waves
overlap
and combine to form a new waveLight
Sound
Slide15Interference – 2 Types
Constructive
In-phase
Crests align with crests; troughs align with troughsAmplitude increasesDestructive
Out-of-PhaseAmplitude decreasesCan cancel out completely
Slide16Electromagnetic Spectrum