Science, asked by mannan123, 1 year ago

what is the concept behind lie detector testing?​

Answers

Answered by shreyanshs147
0

Answer:Heartbeat pulse

Explanation:Whenever we lie , our heartbeat increases and the lie detector machine on detecting this tells it to be a lie.

mannan123: if someone found change in external or internal condition,heart also increases.then?
shreyanshs147: What do you mean?
mannan123: heartbeat
Answered by rslekshmi08
0

The goal of a lie detector is to see if the person is telling the truth or lying when answering certain questions. When a person takes a polygraph test, four to six sensors are attached to him.

mannan123: how? what is key concept?
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