Flame test. Strontium burning in the flame of a bunsen burner producing a red flame. The colour of the flame is caused by electrons that have been excited to a higher energy state. When they relax they emit energy in the form of a characteristic wavelength of light. The colour of the flame is different for different elements and can be used to identify unknown substances | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Andrew Lambert Photography |
Taille de l’image : | 3645 px × 4870 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |