E6F05 : Which of the following describes an optical shaft encoder?
A
A device that detects rotation by interrupting a light source with a patterned wheel
B
A device that measures the strength of a beam of light using analog-to-digital conversion
C
An optical computing device in which light is coupled between devices by fiber optics
D
A device for generating RTTY signals by means of a rotating light source
Correct Answer: A device that detects rotation by interrupting a light source with a patterned wheel