Using a Laser Pointer to Measure the Data Track Spacing on C

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Using a Laser Pointer to Measure the Data Track Spacing on C

Postby Basilio97 » Tue Jan 29, 2013 2:40 pm

I am doing this project as my Science Fair project and I have setup the project, and took a picture of the laser will the its rays refracting from the cd and dvd. I need help putting my numbers into the equation, and solving it so i can get my data. If you want, I can show you the pictures. I need help as soon as possible please.
Basilio97
 
Posts: 2
Joined: Wed Jan 23, 2013 9:38 am
Occupation: Student: 9th grade
Project Question: In this project you'll learn about how diffraction patterns are generated, and you'll find out how you can use a laser pointer and a protractor to measure the microscopic spacing of data tracks on a CD. The objective of this project is to learn how to use a diffraction pattern to measure the pitch (spacing) of the data tracks on CDs and DVDs.
Project Due Date: Today, January 23, 2013
Project Status: I am conducting my experiment

Re: Using a Laser Pointer to Measure the Data Track Spacing

Postby hhemken » Tue Jan 29, 2013 5:50 pm

Basilio97,

Have you searched the ScienceBuddies forums?

http://www.sciencebuddies.org/science-f ... g77bgclmby

Here are a few posts I found, and there are more:

viewtopic.php?f=29&t=3955
viewtopic.php?f=29&t=4923
viewtopic.php?f=2&t=2531
viewtopic.php?f=29&t=8132

Please let us know if you still can't find an answer to your questions.

Good luck!

Heinz Hemken
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Re: Using a Laser Pointer to Measure the Data Track Spacing

Postby Basilio97 » Mon Feb 04, 2013 2:28 pm

I still cannot find the solution to my problem
Basilio97
 
Posts: 2
Joined: Wed Jan 23, 2013 9:38 am
Occupation: Student: 9th grade
Project Question: In this project you'll learn about how diffraction patterns are generated, and you'll find out how you can use a laser pointer and a protractor to measure the microscopic spacing of data tracks on a CD. The objective of this project is to learn how to use a diffraction pattern to measure the pitch (spacing) of the data tracks on CDs and DVDs.
Project Due Date: Today, January 23, 2013
Project Status: I am conducting my experiment

Re: Using a Laser Pointer to Measure the Data Track Spacing

Postby hhemken » Tue Feb 05, 2013 6:03 pm

Basilio97,

Where are you exactly in the procedure:

http://www.sciencebuddies.org/science-f ... #procedure

What steps have you completed? Have you filled out the table?

Heinz Hemken
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hhemken
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Posts: 260
Joined: Mon Oct 03, 2005 3:16 pm

Re: Using a Laser Pointer to Measure the Data Track Spacing

Postby akbarkhan » Fri Feb 08, 2013 8:23 am

During my days in engineering school, I remember plotting results to graph paper to get a visual sense of the data. Nowadays you can use Excel to get a better visual of the data. Think of this as a first step to developing a formal mathematical model (or equation system) as described by the other expert.

Good luck. :D
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