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A semiconductor detector is a device that uses a semiconductor (usually silicon or germanium) to detect traversing charged particles or the absorption of photons. In the field of particle physics, these detectors are usually known as silicon detectors.
WHAT IS A POLYGRAPH? A polygraph used for the purpose of lie detection is an instrument that monitors and records various manifestations of the Sympathetic and Parasympathetic Nervous Systems while a series of carefully designed questions is asked of the person who is attached to the instrument.