You touch the picture of the book's cover. You recently purchased the book and so it appears on your home screen. Let's say you want to read your copy of "Fahrenheit 451" by the late Ray Bradbury. The Kindle Fire's software maps the touch to whatever command you were executing. But the Kindle Fire can sense the changes in the field and map them to a specific spot that corresponds to the display screen. ![]() It's such a weak electric field that you don't sense it yourself. Your finger actually draws current from the field. When your finger - or any material capable of altering the electric field - comes into contact with the screen, the field changes.
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