A CDE Definition
ambient light sensor
A device that detects the amount of light in the vicinity. An ambient light sensor may be built into a smartphone or tablet to adjust the screen brightness based on the available light. See ambient lighting.
Light that comes from all directions. Contrast with "directional lighting," which is made up of a light source with parallel light rays that do not diminish with distance. Also, contrast with "positional lighting," in which the rays are not parallel, but diminish in intensity from the source.
Primary Light Sources
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