North Carolina RADAR State Practice Exam

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How is frequency defined in waves?

  1. The height of the wave

  2. The speed at which waves travel

  3. The number of waves transmitted in one second

  4. The distance between two peaks of a wave

The correct answer is: The number of waves transmitted in one second

Frequency in waves is defined as the number of waves transmitted or produced in one second. It is measured in hertz (Hz), where one hertz equals one wave per second. This concept is crucial in understanding wave behavior, as frequency relates to how often the waves occur in a given time frame, influencing the energy and characteristics of the waves produced. When assessing the other options, the height of the wave pertains to its amplitude, which relates to the energy carried by the wave rather than its frequency. The speed at which waves travel refers to the velocity of the wave, which is calculated by the product of frequency and wavelength. The distance between two peaks of a wave describes the wavelength, not frequency. Therefore, the definition that regards frequency as the number of waves transmitted in one second distinctly captures its essence in wave mechanics.

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