Fiber Optics
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Title: Fiber Optics

Essay Details:

Subject: Miscellaneous
Author: Stanley G
Date: May 16, 2013
Level: University
Grade: B
Length: 6 / 1504

Essay text:

Here he used the well-known signal "one if by land, two if by sea." Although primitive, this was still optical communication and we must give him credit for it. Another contender was Alexander Gram Bell and his photophone (slide 3). With this device, one person would speak into a microphone causing a mirror to vibrate. Then sunlight would reflect off the vibrating mirror and hit another mirror 200 meters away. This mirror would then cause a selenium crystal to vibrate and sound would come out the other end. This seems interesting, but unfortunately this did not work very well at night, in the rain, or when someone simply walked in front of it...

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