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| The distance between crests. The wavelength is measured in meters. A long wavelength means a small frequency. Wavelength times frequency = speeed |
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| The number of times a wave repeats in a second. The frequency cannot be measured from a picture on a page. Frequency is measured in cycles per second, or hertz. Sounds with a high frequency have a high pitch. When the frequency of light is changed, you see different colors. |
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| The time for one complete oscillation. The frequency is inversely proportional to the period. T = 1/f. Period is measured in seconds. |
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