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Hi, I'm Jessica with more technology news you can use.

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How does a CD work?

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I'm not sure. I'm just glad it can be done.

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Believe it or not, sound is not really recorded onto a CD.

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A computer changes sound into ones and zeros called a digital code.

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This special code is then put onto the CD as pitch.

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So how does a CD ever play music?

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When the CD turns, a laser beam hits the pitch and bounces back after reading the digital code number.

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The computer, or your CD player, understands the code and changes it into sound.

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Well, music anyway.

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That's amazing!

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If you think that's amazing, the track that holds the music is only half a micron wide,

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and 40 microns are as wide as a human hair.

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Does NASA use this technology?

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All the time. To see how, check out our website.

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Until next time, I'm Jessica with cool technology news you can use.