Multiple choice general knowledge sports Unit of Wave Number m^-1 m2 m m/s Reveal answer Fill a bubble to check yourself A Correct answer Explanation Wave number (k) is the spatial frequency of a wave, defined as the number of wavelengths per unit distance, measured in reciprocal meters (m⁻¹). 'm²' is area, 'm' is length, and 'm/s' is speed or velocity.