How do CD players make CD’s spin once the sound plays?
In: Technology
I’m not quite sure what you mean by “once the sound plays” but the CD (or any disk-based storage medium for that matter) needs to be brought up to a spin **in order** for its data to be read. This is done by an electric motor.
The tray of the player has a little motor which spins the disc. CDs work sort of like extreme versions of record players. The shiny side of the disc is covered in microscopic pits. Like the grooves on a vinyl record, these pits essentially translate to the information written to the disc. Inside the CD player, a laser shines down onto the pits, like the needle of a record player. The pits reflect light differently than the surrounding surface, and a sensor in the CD player picks up this difference and translates the data into the right format.
The CD has to spin for the player to read all of the data. If it didn’t spin, the player wouldn’t be able to read anything meaningful.
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