You must have noticed that the machine always spits the coin out if it's fake.
Vending machines (Photo: Pixabay)
Mumbai: Have you ever tried putting a wrong or a fake coin in a vending machine? You must have noticed that the machine always spits the coin out. Ever wondered how it detects if the coin is fake?
This is really interesting. Watch and learn:
( Source : Deccan Chronicle. )
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