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Q: What is the S.I. unit of wavelength?
  • A. Hertz
  • B. Kilogram
  • C. Second
  • D. Meter
Correct Answer: Option D - Wavelength is the distance between two successive crests or troughs of a wave. It is always measured in the direction of the propagation of wave. The SI unit of wavelength is meter (m).
D. Wavelength is the distance between two successive crests or troughs of a wave. It is always measured in the direction of the propagation of wave. The SI unit of wavelength is meter (m).

Explanations:

Wavelength is the distance between two successive crests or troughs of a wave. It is always measured in the direction of the propagation of wave. The SI unit of wavelength is meter (m).