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.
Infrared radiation is the next region on the electromagnetic spectrum. We call it infrared because it's just 'below' the red part of the visible spectrum. It spans from frequencies of about 300 gigahertz to about 400 terahertz. This is the same as a range of wavelengths from one millimeter to 750 nanometers.