Bulb research. Prototype low heat light bulb being tested within a miniature Ulbricht,or integrating,sphere. Once closed,the sphere's reflective inner surface allows the intensity of the bulb to be found using a sensor. Photographed at Siemens' Osram Sylvania Laboratory in Beverly,Massachusetts,USA | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Steger, Volker |
Taille de l’image : | 4288 px × 2848 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |