Spectra of Helium Gas Discharge
The following image is color coded spectra of helium
undergoing electrical discharge excitation.
It is computed and plotted in your
browser by a Java program which reads a file containing a list
of emission line wavelengths and their corresponding strenghts.
Note: This program generates deep 24 bit color plots,
therefore you may need to increase the color depth of your system
to view subtle details in these spectra.
There may be a small delay as each Applet
loads it's element emission line file and computes the spectra...
Both neutral and singly ionized helium contribute to the emission lines
in this spectrum.
Different trial parameters :
- vary the lineWidth from 1 to 4 (2.5 is optimum)
- vary the contrast from 1 to 15 (10 is optimum)
- vary the continuum from 0 to 0.7 (0.3 is optimum)
Helium Spectra in Two Parts:
from 4000 to 5500 Ångstroms
and from 5500 to 7000 Ångstroms
Return to element spectra page.