Concentrating sunlight,17th century
Numéro d’image : 11576659
| Concentrating sunlight. Illustration showing various methods of concentrating sunlight in order to ignite some material. The main illustration depicts a lens mounted on a castle turret being used to focus sunlight onto an attacking enemy ship. At the top is a diagram showing parallel light beams being focused by a mirror. In the centre are ray diagrams of a parabolic mirror (left),spherical mirror (right) and the two foci of an ellipse (centre). At the bottom right a light source at the focus of a parabolic mirror is used to project a parallel light beam. This illustration is taken from Kircher's Ars magna lucis et umbrae printed at Rome in 1646. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Middle Temple Library |
| Taille de l’image : | 5932 px × 4332 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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