eli5: how/why does water on a touchscreen have the same effect on it as a finger
In: 8
There are many types of touchscreens. The most commonly used today for smartphones are capacitive.
They have a grid of capacitance sensors and they basically project an electrostatic field across the display. When you touch it, it detects the difference in voltage in those capacitor and can locate where you touched.
It works because your finger conducts electricity. Same with water.
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