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, carried by Na+ ions, that flows into a photoreceptor cell when unstimulated.
- Dark current (physics): The relatively small electric current that flows through a photosensitive device when no photons are entering the device.
- Dark current (chemistry) : The constant response produced by a spectrochemical receptor, in the absence of radiation.
Famous quotes containing the words dark and/or current:
“When have I last looked on
The round green eyes and the long wavering bodies
Of the dark leopards of the moon?
All the wild witches, those most noble ladies,
For all their broom-sticks and their tears,
Their angry tears, are gone.”
—William Butler Yeats (1865–1939)
“If the current is right, one can drift to success.”
—Mason Cooley (b. 1927)