Bunsen burner flames. Blue flames over three different types of Bunsen burner. The blue colour indicates that the gas is burning completely in oxygen | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Winters, Charles D. |
Taille de l’image : | 3762 px × 4947 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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