The photograph of the emission spectrum of sodium shows a single bright yellow line. In fact there are two emission lines,but they are so close together that the picture would have to be enlarged to a length of at least 2 metres before they became distinguishable. The yellow glow of sodium street lights is due to excited sodium atoms emitting light at this wavelength | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Imperial College / Physics Department |
Taille de l’image : | 3889 px × 2480 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |