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
What a Time to Be Alive platinum by the Recording Industry Association of America (RIAA), for combined sales and album-equivalent units of over a million units. Credits adapted from the album's liner notes and Tidal. Notes Credits adapted from album's liner notes and Tidal. Musicians Technical What a Time to Be Alive What a Time to Be Alive is a collaborative commercial mixtape by Canadian rapper Drake and American rapper Future. It was released on September 20, 2015, by Young Money Entertainment, Cash Money Records, Republic Records, OVO Sound, Epic Records, A1 Records and Freebandz. "What a Time to Be Alive" was supported by Drake and