This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionSahaEquationHydrogen.svg
English: Solution for degree of ionization vs. temperature for hydrogen, computed using the Saha Equation, for 3 different values of total density relative to the Loschmidt constant (n0)
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
Captions
Solution for degree of ionization vs. temperature for hydrogen, computed using the Saha Equation, for 3 different values of total density relative to the Loschmidt constant (n.)