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3 Transverse Waves Transverse waves – matter in the medium moves back and forth at right angles to the direction that the wave travels.
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Wave Properties & Types of Waves
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Wave•Wave - Rhythmic disturbance
that carries energy through matter and space
•ALL WAVES CARRY ENERGY!•Pulse – one wave that travels
through a medium•Continuous waves – waves that
repeatedly move up and down
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Transverse Waves•Transverse waves – matter in the medium moves back and forth at right angles to the direction that the wave travels.
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Parts of a Transverse Wave
•Crest – top of a wave•Trough – bottom of a wave
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Parts of a Transverse Wave
•Amplitude – ½ the height of a wave
•Relates to the amount of energy carried by the wave
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Parts of a Transverse Wave
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Parts of a Transverse Wave
•Wavelength – the length of one cycle of a wave
•Abbreviated by using the symbol, λ
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Transverse Wave•Frequency – how many cycles (waves) are completed in a given time (usually 1 second)
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Compression/Longitudinal Waves
•Compressional waves – matter in the medium moves in the same direction that the wave travels. Example: Sound waves
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Parts of a compression wave
Compression – the area where the particles are more dense
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Parts of a compression wave
Rarefaction – The less dense area of the wave
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Parts of a compression wave
Wavelength – One complete cycle of a wave
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Surface Waves•both transverse &
compressional; •examples: water waves, seismic waves
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Medium•Most waves need something to travel on (or through)
•The substance through which a wave travels is a medium
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Standing Waves•Appear to be standing still•Standing waves are caused by two waves continuously interfering with each other.
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Types of Waves…
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Reflection•The angle at which a ray strikes a surface is equal to the angle at which it is reflected
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Reflection
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Reflection
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Reflection
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Reflection
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Period and Frequency•Period (T) – time it takes for
one wave to pass•The unit of a period is the
second (s)•Frequency (f) – the number of
waves that pass each second•The unit of frequency is Hertz
(Hz)
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Formula 1•Frequency = 1/ period•f = 1/T
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Formula 2•Frequency = # waves / time
•f = # waves / t
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Formula 3•Speed = frequency x wavelength
•S = f x λ