Light-dependent resistor

Light-dependent resistor

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: Light-dependent resistor. Also known as photoresistors or photoconductors, light-dependent resistors are electrical devices that change their resistance with varying light levels. They are usually made from a cadmium sulphide based semiconductor. Light-dependent resistors can be used as light sensors and are typically 150 Ohms in bright light and 10 Megaohms in complete darkness.

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