An iron rod is heated with a torch. The iron in the metal changes colour from red to white as the temperature rises,in a process called thermionic emission of light. The colour of the light given off by the top metal is called the colour temperature. Image 1 in a series of 3 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kinsman, Ted |
Taille de l’image : | 5616 px × 3744 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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