Dark current: Facts, Discussion Forum, and Encyclopedia Article

Dark current

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	Dark current is the constant response exhibited by a receptor of radiation during periods when it is not actively being exposed to light. It may refer to: Dark current (biochemistry) : The depolarizing current Electric current Electric current is the flow of electric charge. The electric charge may be either electrons or ions.The International System of Units unit of electric current intensity is the ampere.... , carried by Na Sodium Sodium is an element which has the symbol Na , atomic number 11, atomic mass 23 amu , and a common oxidation number +1. Sodium is a soft, silvery white, highly reactive element and is a member of the alkali metals within "group 1" .... ⁺ ions, that flows into a photoreceptor cell when unstimulated. Dark current (physics) Dark current (physics) In physics and in electronic engineering, dark current is the relatively small electric current that flows through photodetector such as a photomultiplier tube, photodiode, or charge-coupled device even when no photons are entering the device.... : The relatively small electric current that flows through a photosensitive device when no photons are entering the device. Dark current (chemistry) Dark current (chemistry) In analytical chemistry, dark current refers to the constant response produced by a spectrochemical receptor, even in the absence of radiation. This response adds to the signal produced when the receptor is used to measure light and so must be dealt with to determine how much of the detector response is actually due to the radiation.... : The constant response produced by a spectrochemical Spectroscopy Spectroscopy was originally the study of the interaction between radiation and matter as a function of wavelength . In fact, historically, spectroscopy referred to the use of visible light dispersed according to its wavelength, e.g.... receptor, in the absence of radiation.