These wavelengths have no physical link to electronic transition levels in pure water. (scienceofdoom.com)
The light emitted by LEDs is generated by electronic transitions in solid - state semiconductors. (sciencedaily.com)
The reason for this is that the term «gamma ray» is used for photons generated from nuclear decay or other nuclear and subnuclear processes, whereas X-rays are generated by electronic transitions involving highly energetic inner electrons. (newworldencyclopedia.org)