Optical power measures the rate at which light energy is emitted or received. Wavenumber and wavevector describe the spatial frequency of waves.

1 ky = 100 1/m; The unit "ky" is a wavenumber unit used in optics to represent the spatial frequency along the y-axis. It is dimensionally reciprocal to length (L-1).

1 Ryd = 10973731.56815712 1/m; The "ryd" is a unit of wavenumber or wavevector in the field of optical power. It is commonly known as the Rydberg constant in physics.