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
DescriptionVibrationrotationenergy.svg
English: Schematic energy level diagram for vibration-rotation spectra. (Normally the energy difference upon changing the vibrational quantum number ν is much larger compared to the differences between rotational levels.)
This work has been released into the public domain by its author, David-i98 at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: David-i98 grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse
Original upload log
The original description page was here. All following user names refer to en.wikipedia.