Craig_Bridge wrote:I personally haven't dealt with this experiment before. Others have done it with assistance from other experts. Try looking at this dialog and see if anything in it clears up some of your questions: http://www.sciencebuddies.org/mentoring/phpBB2/viewtopic.php?t=2247
Hopefully another expert who has helped with this one will respond but it might not be within your restricted time frame.
LaserMatt wrote:Hi, I found this science project idea on this website and it was a really cool project. The only problem is, now that I've measured all of the angles of diffraction of the laser on a protractor, I don't know how to analyze the data. Do I subtract 90 degrees from all angles, or only some of them? When I get a negative number for the distance calculation, what does that mean? I used the data table given in the experiment, but don't know how to make common sense of the measurements. What is the spacing? Should a DVD have closer spacing than a CD? How do the numbers correlate with reality? And finally, can the data track spacing be converted to minutes of remaining recording time or something useful? I mean, if all these numbers tell me is the spacing of the data tracks, how is that useful in a practical sense? Please help me out, my project is due in a week but I'm going out of town with my parents on Friday. Thanks in advance.
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