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Author Topic: What is a light pen?  (Read 1671 times)

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What is a light pen?
« on: July 03, 2015, 08:46:42 PM »
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What is a light pen?

Options are:

a. A Mechanical Input device
b. Optical input device
c. Electronic input device
d. Optical output device

Correct answer is (b)

b. Optical input device

Engineering Education Forum

What is a light pen?
« on: July 03, 2015, 08:46:42 PM »