What can lie detectors be used for?

In today’s world, we cannot deny the fact that everybody lies. Doesn’t matter the question is about being late or cheating in a relationship, people lie whenever they feel so, resulting in huge trust issues. A person on an average lies approx 2 to 3 times a day.

Lie detectors are such a boon in such cases. They are machines that work on the basic phenomenon of change in physiological indices like blood pressure, heart beat rate, sweating, respiration, skin conductivity and many others while telling lies. We all know that we cannot tell lies with the ease we speak the truth.