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How does a dollar bill changer work?

Kategorie: Wissen und Wissenschaft
Kanal: BrainStuff
Datum: 6. Januar 2015, 0:11
Stufe: B1-B2 (Mittelstufe)

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A dollar bill changer doesn't just have to sense a bill's denomination -- it also needs to be able to tell whether bills are fake. Join Marshall Brain as he breaks down the science behind bill changers in this podcast from HowStuffWorks.com. Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers