Photodetectors detect electromagnetic energy, such as light, and can be mechanical, biological, or chemical. They can be used for various purposes, including as thermometers, to measure radiation, generate voltage, amplify current, and record images. Photodetectors are present in many devices, from telescopes to remote controls, and can have additional functions, such as conducting an electric […]
Polygraph tests are unreliable in detecting lies, as they primarily measure skin conductance which can be easily falsified. Even expert liars can pass the test, while false positives are common. The test can ruin careers and give a false sense of security, leading to laziness in security measures. The assumption that there is a consistent […]
