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How a cd drive works




By amansiddique on Nov 28, 2008

" "
I want to know how a cd drive read a cd
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Solution #1

posted on Nov 28, 2008
Not Rated)

WhiteRussian
WhiteRussian

Rank: Wiz 
Rating: 81%, 92 votes
A intense laser burns "micro-holes" in the film to represent the data...

A low intensity laser reads the spaces the high intensity laser left behind because the film casts back a reflection

DVD's work very similar; one low intensity layer and one high intensity layer. Furthermore, the laser makes much better use of the surface space so the DVD can hold more data

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