a. Wavelength. The length of radio wave is the distance traveled by the wave in the period of
time required to complete one cycle. Each complete cycle of two alternations of the wave (figure 7) is
one wavelength and is expressed in meters. This wavelength may be measured from the start of one
wave to the start of the next wave, or from the crest of one wave to the crest of the next wave. In either
case, the distance is the same.
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