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WAVES A wave is a rhythmic disturbances that transfer energy through matter or space.
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A wave does work on everything in its path.
WAVES A wave does work on everything in its path.
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WAVES Wave Classification
Mechanical Wave -- Waves that require a medium (matter) Electromagnetic Waves -- Waves that do not require a medium (matter)
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Mechanical Waves Waves that require a medium
A medium may be a gas, a solid, or a liquid. Simply put a medium is the material through which a wave transfer energy.
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Mechanical Waves Waves that require a medium Examples Ocean waves
Earthquakes
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Mechanical Waves Waves that require a medium
Cause rhythmic disturbance in the medium • Travel through medium • Transmit energy • Leave the medium unchanged after the wave passes
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Mechanical Waves Examples 1. Radio waves 2. Visible light
Waves that require a medium Examples 1. Radio waves 2. Visible light
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Mechanical Waves Examples 1. Radio waves 2. Visible light
Waves that require a medium Examples 1. Radio waves 2. Visible light
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Electromagnetic Waves
Waves that DO NOT REQUIRE a medium These waves do not require matter for transfer energy. Can travel through outer space or a vacuum.
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Waves NOW REMEMBER… There are two types of waves: 1.Mechanical Waves
2.Electromagnetic Waves Wave type is based on whether or not the wave needs a medium to travel through.
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Characteristics Of Waves
1. Different Movements of Waves 2. Physical Characteristics a Transverse Wave 3. Calculation of Wave Velocity
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Characteristics Of Waves
Transverse waves – Medium moves at right angles to the direction of the wave Longitudinal or Compressional Waves – Medium moves in the same direction as the waves are moving
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Movements Of Waves Transverse waves – Medium moves at right angles to the direction of the wave
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Movements Of Waves Longitudinal or Compressional Waves – Medium moves in the same direction as the waves are moving
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Waves Now Remember… There are two types of waves: 1.Mechanical Waves
2.Electromagnetic Waves AND… Waves are classified by the way they travel 1.Transverse Waves 2.Longitudinal or Compressional Waves
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Physical Characteristics
of Transverse Waves Crest - The highest point of a wave
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Physical Characteristics
of Transverse Waves B. Trough - The lowest point of a wave
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Physical Characteristics
of Transverse Waves Wavelength -- The distance between a point on one wave and the identical point on the next wave.
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Physical Characteristics
of Transverse Waves Wavelength -- Represented by the Greek letter lambda λ
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Physical Characteristics
of Transverse Waves Amplitude -- The distance from the crest or trough of a wave to the rest position.
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Physical Characteristics
of Transverse Waves Frequency - The number of waves crests of a wave that pass one place in one second
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Physical Characteristics
of Transverse Waves Frequency is measure in hertz (Hz). One hertz = one wave per second Frequency is represented by the letter f.
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Physical Characteristics
of Transverse Waves Example A: If ten wave crest pass a point every five seconds, what is the frequency of the wave?
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Physical Characteristics
of Transverse Waves Example A: If ten wave crest pass a point every five seconds, what is the frequency of the wave? f = ten waves / 5 seconds f = 2 hertz
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