This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Hg Niederdruck Spektrum. Spektrum von Quecksilberdampf own original text selbst gezeichnet Herbertweidner Okt CEST PDrelease original upload log de Leyo CommonsHelper page de HgNiederdruckSpektrum Herbertweidner bytes no Andere Versionen Mercuryvapor lamps
Page 2023 Free-images.com. All images are Public Domain