Microspheres. Coloured Scanning Electron Micro- graph (SEM) of clusters of microspheres. These spheres or beads are synthetically made to a variety of very exact sizes. They are used to calibrate microscopes; either examined directly as samples or added to an unknown sample and used as an internal standard of size. Microspheres are used to calibrate both optical and electron microscopes. Magnification: x330 at 6x7cm size. x530 at 4x5ins | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Scharf, David |
Taille de l’image : | 3072 px × 2265 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
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