photoresistance
Illumination changes conductivity
Photoresistance is the property of a material whose electrical resistance changes when exposed to light.
Materials with high photoresistance conduct electricity poorly in darkness but become more conductive when illuminated.
This property is exploited in photoresistors—components used in light-sensing circuits like automatic streetlights and camera exposure meters.
One who directs
- photocellLight-sensitive electronic component
- semiconductorPartial electrical conductor
- photodetectorLight-to-electricity conversion device
- phototransistorLight-sensitive amplifying component
photodiode · photosensor · silicon · transducer · photoconductor
Visible electromagnetic radiation
- darknessTotal absence of light
- illuminationProvision of light
- luminosityIntrinsic brightness of source
- intensityStrength or force level
ambient · infrared · ultraviolet · wavelength · exposure · contrast · irradiance · lux
Resistance measurement units
- conductivityAbility to carry current
- voltageElectrical potential difference
- currentDirected flow of charge
- impedanceAC circuit opposition
circuit · analog · signal · threshold · sensitivity · linearity · hysteresis
Roadside illumination fixture
- nightlightDim plug-in lamp
- colorimeterDevice measuring color intensity
LDR
One who directs
- photocellLight-sensitive electronic component
- semiconductorPartial electrical conductor
- photodetectorLight-to-electricity conversion device
phototransistor · photodiode · photosensor · silicon · transducer · photoconductor
light
Visible electromagnetic radiation
- darknessTotal absence of light
- illuminationProvision of light
- luminosityIntrinsic brightness of source
intensity · ambient · infrared · ultraviolet · wavelength · exposure · contrast · irradiance · lux
ohms
Resistance measurement units
- conductivityAbility to carry current
- voltageElectrical potential difference
- currentDirected flow of charge
impedance · circuit · analog · signal · threshold · sensitivity · linearity · hysteresis
streetlight
Roadside illumination fixture
- nightlightDim plug-in lamp
- colorimeterDevice measuring color intensity
photoresistancepassive resistance
Opposing through peaceful noncompliance
photo, photograph, photography, photographic, photographer, photon, photosynthesis, photoelectric, photocopy