Heating sulphur (yellow) in a bunsen burner flame (blue). Sulphur melts at 115 degrees Celsius,but will normally burn in air with a blue flame | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Andrew Lambert Photography |
Taille de l’image : | 3759 px × 4961 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |