The Diffraction Apparatus (DAK) includes a set of slits and a red laser. The slit dimensions and laser wavelengths are critical dimensions for comparing experimental results with theory.

The tolerance of slit widths and separations is 3-4 microns.

The laser wavelengths are:

red (included with the purchase of the Diffraction Apparatus (DAK)) 635 ± 5 nm
green (purchased separately: Green Diffraction Laser (GDL-DAK))
before August 2024 532 ± 1 nm
after August 2024 520 ± 10 nm

Both the red and green lasers are class 2 laser products.

Published: October 16, 2013. Updated: October 24, 2024.