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
Oh, What Songs of the Heart blest, There's no word, there's no thought can impart, But our rapture will be All the soul can attest, In the heavenly songs of the heart; But our rapture will be In the vision we'll see Best expressed in the songs of the heart Oh, what songs we'll employ! Oh, what welcome we'll hear! When we kneel at our dear Savior's feet. And the heart swells with joy In embraces most dear When our heavenly parents we meet! Oh, what songs we'll employ As the heart swells with joy, When our heavenly parents we meet! </poem> "Oh, What Songs of