Wavenumber Wavenumber In the physical sciences, the wavenumber (also wave number or repetency) is the spatial frequency of a wave, measured in cycles per unit distance or radians per unit distance. Whereas temporal frequency can be thought of as the number of waves per unit time, wavenumber is the number of waves per unit distance. In multidimensional systems, the wavenumber is the magnitude of the wave vector. The space of wave vectors is called reciprocal space. Wave numbers and wave vectors play an essential role in optics and the physics of wave scattering, such as X-ray diffraction, neutron diffraction, and elementary
Control of Vibration at Work Regulations 2005 to identify which of their employees may be at risk from hand arm vibration disorders (HAV) or whole body vibration disorders (WBV) Hand arm v disorders can be caused by the use of hand-held power tools and can cause painful and disabling disorders of the blood vessels, nerves and joints. The risk of suffering from a disorder is increased dependent on the exposure to vibration and can vary widely between individuals. The symptoms, which affect the blood supply to the fingers, are also known as vibration-induced white finger. Whole body vibration is transmitted via the seat when sitting down in