TED-ED: How to spot a counterfeit bill - Tien Nguyen

The video tutorial explains the issues caused by counterfeit money and how to detect fake bills using simple tools and chemistry. It introduces the anti-counterfeit detection pen, which uses iodine to reveal starch in fake bills. Authentic bills are made of cotton and linen, while counterfeit ones often contain starch. The video also covers UV light countermeasures, where bills have a fluorescent strip that glows under UV light, helping to identify fakes. Additionally, it discusses visual cues like lifelike portraits and even spacing in serial numbers to spot counterfeit bills.

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