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A wave is written y = A sin(kx - wt). Its wave number k equals:
A2 pi times the wavelength
Bwavelength over 2 pi
C2 pi over the wavelength
Dfrequency over 2 pi
Answer & Solution
Correct answer: C. 2 pi over the wavelength
Wave number is defined as k = 2 pi / lambda, with unit rad per metre.
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