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      • A drive motor spins the disc. This drive motor is precisely controlled to rotate between 200 and 500 rpm depending on which track is being read. A laser and a lens system focus in on and read the bumps. A tracking mechanism moves the laser assembly so that the laser's beam can follow the spiral track.
      electronics.howstuffworks.com/cd.htm

      When Were CDs Invented, and How Do They Work? | HowStuffWorks

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  3. en.wikipedia.org › wiki › Compact_discCompact disc - Wikipedia

    The compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. It uses the Compact Disc Digital Audio format which typically provides 74 minutes of audio on a disc.

  4. www.techtarget.com › definition › compact-discWhat is compact disc (CD)? | Definition from TechTarget

    A compact disc is a portable storage medium that can record, store and play back audio, video and other data in digital form. A standard compact disc measures 4.7 inches, or 120 millimeters (mm), across, is 1.2 mm thick, weighs between 15 grams and 20 grams, and has a capacity of 80 minutes of audio, or 650 megabytes (MB) to 700 MB of data. A ...

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  6. www.britannica.com › technology › compact-discCompact disc (CD) | Definition & Facts | Britannica

    1 day ago · Compact disc, a molded plastic disc containing digital data that is scanned by a laser beam for the reproduction of recorded sound and other information. Learn more about the history of the compact disc, starting with its commercial introduction in 1982.

    • The Editors of Encyclopaedia Britannica

  7. www.electroschematics.com › compact-disc-how-it-worksHow Do Compact Discs (CDs) Work? | ElectroSchematics.com

    Feb 6, 2010 · Explore The Basics Of Compact Discs (CDs), Including; How They Work, What They Are Made Of, and How Lasers Read Them. Visit Today To Learn More.

  8. www.scienceabc.com › innovation › how-does-a-compactHow Does A Compact Disc (Or DVD) Work? - Science ABC

    Oct 19, 2023 · What Is A Compact Disc? Compact disc CD is a digital storage format for optical media jointly developed by Philips and Sony. The CD format was originally developed for storing and playing sound recordings but was later adapted for storing data.

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  9. www.geeksforgeeks.org › what-is-a-cd-compact-diskWhat is compact disc (CD)? Definition, Types and More

    Aug 29, 2023 · Compact disc is portable storage devices used for storing digital data like recording, storing, and playing video, and audio. Compact Disc can be explained as a disc-like memory device made from plastic material.

  10. electronics.howstuffworks.com › cdWhen Were CDs Invented, and How Do They Work? | HowStuffWorks

    Mar 6, 2024 · A compact disc or CD is a disc that's made of plastic and used to store data such as video, audio and text files. Compact discs replaced floppy discs because they are more efficient to use and can store more data.

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