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Asked in PMC Practice Test 2

In a periodic wave, the distance between the second and fifth crest is 15 cm. What is the wavelength of the wave?

Correct answer: B. 5 cm

  • A. 45 cm
  • B. 5 cm
  • C. 1/5 cm
  • D. 1/3 cm

Explanation

The distance between 2nd and 5th crest is 15 cmGoing from the 2nd to the 5th crest, there are 3 wavelengths.Using a simple ratio method:15 cm : 3λx cm : 1λx = 15/3x = 5

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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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