How It Works
Like a full-size CD player, a portable CD player reads the bumps and grooves using a laser. With its photocell (a device that detects any sort of light reflection given off of certain area), it determines whether there is a reflection of light given off from the CD when the laser hits. Depending on the light reflection, the photocell will return a 1, if there is no reflection, or a 0, if there is any light refection. When its laser hits a groove on a CD, it will not reflect any light, making it a 1. When its laser hits a bump or any other surface on the CD, a light reflection will appear making it a 0. The series of data from 0-1 on the CD is then transformed by a digital to analog converter, to recreate the shape of a sound wave. The headphones then amplify the sounds and then the audio is now able to be heard.
Read more about this topic: Portable CD Player
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“The works of the great poets have never yet been read by mankind, for only great poets can read them. They have only been read as the multitude read the stars, at most astrologically, not astronomically.”
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