electromagnetic radiation shortwave radiation 2020-05-19T22:14:12Z short-wave radiation An electromagnetic radiation process during which radiant energy with wavelengths in the visible, near-ultraviolet, or near-infrared spectra is realised. There is no standard cut-off for the near-infrared range; therefore, the shortwave radiation range is also variously defined. It may be broadly defined to include all radiation with a wavelength of 0.1 micrometers and 5.0 micrometers or narrowly defined so as to include only radiation between 0.2 micrometers and 3.0 micrometers.