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.
The infrared part of the electromagnetic spectrum covers the range from roughly 300 GHz to 400 THz (1 mm - 750 nm). It can be divided into three parts: Far-infrared, from 300 GHz to 30 THz (1 mm â 10 Î¼m). The lower part of this range may also be called microwaves or terahertz waves.