Lie Detector Apparatus Name Explained
A lie detector apparatus is primarily used to measure and record several physiological indicators such as blood pressure, pulse, respiration, and skin conductivity. These indicators are believed to change when a person is being deceptive.
Instrument Identification
The question asks for the common name for a lie detector apparatus.
- Polygraph: This instrument is specifically designed to record multiple physiological responses simultaneously and is widely known as a lie detector.
- Seismograph: This device detects and records seismic waves, used for studying earthquakes. It is unrelated to lie detection.
- Barograph: This instrument records atmospheric pressure, often used in meteorology. It does not measure physiological responses for lie detection.
- Polarimeter: This device measures the optical rotation of polarized light. It is used in chemistry and physics and is unrelated to lie detection.
Based on the functions, the apparatus commonly known as a lie detector is the Polygraph.
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