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Questions and Answers
What are the three common types of touch screen technologies discussed in the text?
Capacitive, infrared, resistive
How does a surface capacitive touch screen determine the point of touch?
By measuring the decrease in capacitance at the corners of the screen.
What type of touch screens allow multi-touch capabilities?
Projective capacitive touch screens
What is the advantage of capacitive touch screens over resistive screens in terms of image clarity?
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What is the disadvantage of surface capacitive screens in terms of usability?
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How do infrared touch screens detect touch input?
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What technology is used to build up an image of a solid object through a series of very thin 'slices' in CT scanners?
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How are the 'slices' that make up a representation of the 3D solid object in CT scanners built up?
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What is stored as a digital image in the computer memory when using CT scanners?
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What is represented digitally in the computer memory when using CT scanners?
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What are the different names that tomographic scanners can have depending on how the image is formed?
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What does a touch screen allow the user to do?
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