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Railways PYQCBT 2 2017

RRB NTPC · Question 69

Which of the following is NOT a characteristic of the 'wave'?

  1. Wavelength

  2. Amplitude

  3. Frequency

  4. Medium

Show answer & explanation

Answer: (D) Medium

Explanation

Wavelength, amplitude and frequency are properties of a wave. The medium is what a mechanical wave travels through; it is not a characteristic of the wave, and light needs no medium at all.