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Wavelength The distance between one point on a wave and another point exactly like it.

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Frequency The number of wavelengths that pass a point in one second. Measured in hertz (Hz). FM Radio station frequencies.

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Frequency As frequency increases, wavelength becomes shorter. This is an inverse relationship.

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Amplitude This is the “height” of a wave.

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Amplitude The greater the amplitude, the more energy a wave has. AM Radio stations.

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Wave Speed Another name for speed is velocity. Units for speed are usually a distance/time (cars: miles per hour)

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Wave Speed Speed = Frequency x Wavelength Or… V = f x λ

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Wave Speed Example: A wave has a wavelength of 2 m and a frequency of 3.5 Hz. What is the speed? V = 3.5 Hz x 2 m

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Wave Speed Hint: 1 Hz = 1/second So V = 3.5/s x 2 m V = 7 m/s

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Wave Speed Example: A wave has a speed of 9.0 m/s and a wavelength of 3.0 m, what is the frequency?

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Wave Speed

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V f λ.

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