Princeton's WordNet(1.00 / 1 vote)Rate this definition: beneficial, good(adj) promoting or enhancing well-being. an arms limitation agreement beneficial to all countries; the beneficial effects of a temperate climate; the experience was good for her.
The near infrared absorption spectrum of liquid water at 20Â°C has been reinvestigated using a PbS cell detector system. The total spectral range investigated was from 0.70 to 2.50Î¼. A curve is included which shows five prominent absorption bands at 0.76, 0.97, 1.19, 1.45, and 1.94Î¼; and a table gives experimental results of water absorption at 20Â°C.
Ultraviolet Water Purification-UV. Ultraviolet water purification lamps produce UV-C or germicidal UV, radiation of much greater intensity than sunlight. Almost all of a UV lamp's output is concentrated in the 254 nanometers (nm) region in order to take full advantage of the germicidal properties of this wavelength.ltraviolet Water Purification-UV. Ultraviolet water purification lamps produce UV-C or germicidal UV, radiation of much greater intensity than sunlight. Almost all of a UV lamp's output is concentrated in the 254 nanometers (nm) region in order to take full advantage of the germicidal properties of this wavelength.