Computer Science for IGCSE & O level - Hardware (Section 12 - No. 14)
How does a capacitive touchscreen detect touch?
By sensing the change in electrical capacitance when a finger touches the screen.
By emitting infrared beams across the screen.
By measuring the pressure applied to the screen.
By using a laser to detect the touch point.
Explication
Capacitive screens use a conductive layer and measure the change in capacitance when touched.