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2 August, 23:31

An electromagnetic wave traveling through a vacuum has a wavelength of. 15 meter. What is the period of this electromagnetic wave?

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  1. 3 August, 02:23
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    Tools we'll need:

    Speed of EM wave in vacuum = 3 x 10⁸ meters per second.

    Frequency = (speed) / (wavelength)

    Period = 1/frequency

    Period = (wavelength) / (speed) = (0.15) / (3 x 10⁸) = 0.5 nanosecond

    ("nano ... " = 10⁻⁹)
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