Rami Arieli: "The Laser Adventure" CD Lab Page 1

Compact Disk as a reflection grating Explanations about CD can be found in Section 9.4.1.

This experiment was modified to fit a lower level high school (or even some middle schools).

Objectives:

Part A

Using interference of He-Ne laser light (of a known wavelength) reflected off a Compact Disk (CD), to find (verify) the distance (d) between the grooves of the CD.

Part B

To use interference of laser light off a CD (of known groove separation) to find the wavelength (l) of light from a diode laser.

Advanced