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14 August, 02:47

A radio wave has a wavelength of 300 m. The wave moves with a speed of 3.0 * 108 m/s. What is the frequency of the radio wave? A. 1.0 * 106 Hz B. 1.0 * 10-5 Hz C. 1.0 * 10-6 Hz D. 1.0 * 105 Hz

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  1. 14 August, 02:56
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    Frequency = (speed) / (wavelength)

    = (3 x 10⁸ m/s) / (300 m)

    = 1 x 10⁶ per sec

    = 1 mHz

    This frequency is the " 1000 " or " 100 " that's marked

    in the middle of your AM radio dial.

    If there's an AM station in your city that broadcasts on 1000 kHz

    and you tune your radio to it, you're picking up radio waves

    that are 300 meters long. (about 0.19 of a mile)
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