We’re going to use a laser pointer and a protractor to measure the microscopic spacing of the data tracks on a DVD and a CD. The really cool part is that you’re going to use an interference pattern to measure the spacing of the tracks, something that you can’t normally see with your eyes.

[am4show have=’p9;p58;’ guest_error=’Guest error message’ user_error=’User error message’ ]

We’re going to measure the data track spacing using a diffraction pattern and a little math.

Click here to go to next lesson on Wave-Particle Duality

[/am4show]