CD's as parabolic mirrors?

From: Chuck McManis <>
Date: Mon Dec 11 20:36:36 2000

>But why would it appear concave from the label side, and convex from the
>data side?

Come on folks, think about this! CD's are slightly parabolic to the label
side because the darn CD cases take moch more force to get the CD *out*
than they do to put the CD *in*. So when you grab a CD by its edges and
pull to get it out, it is flexed into a parabola toward the label. Many
people push on the center area when replacing CDs in the case and thus
never counter out this original flexing.

Received on Mon Dec 11 2000 - 20:36:36 GMT

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