PARTS OF A WAVE...waves.notebook 7 November 20, 2015 Jan 309:13 PM Speed of Waves Speed= Frequency x...
Transcript of PARTS OF A WAVE...waves.notebook 7 November 20, 2015 Jan 309:13 PM Speed of Waves Speed= Frequency x...
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waves.notebook
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WAVES
Take out looseleaf:
Heading: Wave Notes
Nov 69:37 PM
PARTS OF A WAVE
Bill Nye Waves: 3:06
Crest
http://www.youtube.com/watch?v=pMIdzILycTY
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Wave: a traveling disturbance that carries energy from one place to another
a wave travels through a substance called the medium
Example: Water is the medium for ocean waves. Air is the medium for sound waves.
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Wavelength: measured from crest to crest or trough to trough.
Amplitude: distance from crest to resting position of the medium
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http://ny.pbslearningmedia.org/asset/lsps07_int_amplitude/amplitude and sound interactive
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All waves have amplitude,wavelength and frequency.
Amplitude: the height of the crest or the depth of the trough from the undisturbed surface
Wavelength: the distance between two crests or two troughs Frequency: the number of waves per unit time
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Frequency is measured in hertz (Hz). 1 Hz = 1 wave/second
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As the frequency increases, wavelength decreases.
As the frequency decreases, wavelength increases.
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Types of Waves
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Transverse Waves: a wave in which the matter in the medium moves at a right angle (up and down) to the direction in which the wave is traveling (light)
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Longitudinal Waves: a wave in which the matter in the medium moves back and forth in the same direction as the wave is traveling. (sound)
Do ws
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Longitudinal Wave
Compression: crowded areas ( the crests)
Rarefaction: least crowded areas ( the troughs)
Wavelength: measured from compression to compression
Amplitude: the more compressed, the greater the amplitude
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November 20, 2015
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Speed of Waves
Speed= Frequency x Wavelength
The speed of a wave depends upon the medium through which it travels. Waves move more slowly in a denser medium.
Why do you see lightning before you hear thunder?
Different waves travel at different speeds.