Place pickle across the electrodes
and
turn on the outlet strip. Pickle conducts because of salt
solution
and will eventually glow yellow. Glow is due to arcing across
gaps
of vapor where the pickle has dried out near an electrode. Sodium
D lines can be seen with a diffraction grating.
NOTES
Use caution around exposed 120
V
electrodes. Plug the apparatus into an outlet strip with a GFI, a
switch, and an indicator light.
