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Asked in PMC Practice Test 13 (2021) 2021

In a periodic wave, the distance between two consecutive crests is known as:

Correct answer: A. Wave length

  • A. Wave length
  • B. Amplitude
  • C. Displacement
  • D. None of these options are correct

Explanation

OPTION A: Distance between two consecutive crests, two consecutive troughs, or any two in-phase points can be labeled as a Wavelength.OPTION B: Amplitude is incorrect as amplitude is the maximum displacement of a wave from its equilibrium position and represents the height of the wave.OPTION C: Displacement is a vector quantity that represents the change in the position of a particle or wave. Displacement can be related to the Wavelength, but it is not the same as wavelength.

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About Progressive Waves

Progressive waves transfer energy through a medium or space while particles oscillate about their equilibrium positions. The work includes amplitude, wavelength, frequency, period, phase difference, wave speed and the progressive wave equation, while distinguishing travelling waves from stationary waves, where the pattern has fixed nodes and antinodes.

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