How touch screen phones work › Bernie's Basics (ABC Science)
How touch screen phones work › Bernie's Basics (ABC Science): "Touch screens on phones and tablets really have the X factor. Being able to text, phone or film something just by swiping your finger on glass almost makes up for all those other failed sci-fi promises of the 60s.But considering how futuristic touch screens seem, they rely on a bit of physics that's almost as old as Newton — capacitance — and the fact that your finger is three parts salty water."
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