biophysical ultraviolet-visible spectroscopy Ultraviolet-visible spectroscopy or ultraviolet-visible spectrophotometry (UV-Vis or UV/Vis) involves the spectroscopy of photons in the UV-visible region. This means it uses light in the visible and adjacent (near ultraviolet (UV) and near infrared (NIR)) ranges. uv-vis ultraviolet-visible spectrophotometry orchard PSI-MI UV/Vis 2009-10-28T11:12:27Z MI:0966