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
Santander Cycles year is not available. A credit or debit card can be used in a docking station to release a bicycle. Access for 24 hours or 7 days can be purchased. Cycles may be rented at any time during the access period; use for no more than 30 minutes at a time is free of charge. Usage charges, additional to the access charge, are weighted to favour shorter use. Bicycles may be used any number of times within the access period, each use charged according to its duration. The original bicycles were built by Cycles Devinci to the following specification: The