Radiometry

The measurement of electromagnetic radiation, covering the detection and quantification of radiant energy from ultraviolet through visible to infrared and beyond. In food science, radiometric techniques verify irradiation doses applied to foods, monitor natural and artificial radioactivity in commodities, and calibrate instruments from light meters to thermal imagers. Accurate radiometry underpins process validation: an irradiation plant must prove every package received the intended dose, and environmental monitoring must reliably detect contamination after nuclear incidents. The discipline demands calibrated detectors, traceable standards, and careful geometry, since measured values depend strongly on distance, shielding, and source distribution.