Tuesday, January 24, 2012


Haleigh Marshall finds the distance between tracks on a CD!!

First find the diffraction distances!!

It takes a steady hand!!!

Chemistry I students calculated the distance between tracks on a CD using a red laser and a CD to find a diffraction pattern on a wall.  They then used a mathematical formula to discover there are 1500 nanometers separating the tracks on a CD!!  Students also learned that there are a billion nanometers in a meter and that blue lasers can cut through a CD.  Lasers have many uses in the medical and military fields as well as in grocery bar code scanners.

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