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Computing Sciences and Engineering. HELP NEEDED URGENTLY!!!!

Postby Steff » Sat Apr 17, 2004 1:24 am

Dear Expert,

I really need help with developing an investigation from my idea. For several weeks, I have been trying to find or think of a model that I could build or an experiment I could do to explain how lasers read CDs (I have a computer's CD drive that I could use in this assignment). Can you help me? I have no idea how to show how a laser reads a CD, and if you do, I would REALLY appreciate it if you told me!!!!



Former Expert
Posts: 40
Joined: Sun Dec 21, 2003 11:48 pm

How CDs work

Postby davidkallman2 » Thu Apr 22, 2004 1:31 pm

Hi Steff,

Take a look at to see if the information there works for you. Please let me know.

Science Buddies Mentor

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Postby Steff » Fri Apr 23, 2004 4:33 am

Thanks for posting a reply Dave! To tell you the truth, I had already come across the HowStuffWorks site and it was pretty helpful. Thanks anyway, and if you or anyone has any other ideas, I would definitly like to hear them.

Thanks again,

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Joined: Mon Dec 08, 2003 5:46 pm

Postby shijun » Tue Apr 27, 2004 2:48 pm


Howstuffworks covers the cd reading process by a laser pretty nicely. There isn't a whole lot more to it really without going into semiconductor physics (if you want to learn about how to lay metals onto a substrate, for example).

I have found a couple more sites you might want to look at (they are actually not as detailed as Howstuffworks but may help you understand the concepts from a different angle): ... sics2.html ... 540&page=2


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