Portrait of Samuel Langley
Numéro d’image : 11829630
| Portrait of Samuel Pierpont Langley (1834-1906),American astronomer and aviation pioneer. Langley had no formal education,and taught himself about engineering and astronomy. In the latter field he was a pioneer of infrared astronomy. He invented a device consisting of a thin,blackened platinum wire linked to a galvanometer and a spectrometer. This 'bolometer' allowed very precise measurement of solar radiation at different wavelengths,including infrared. Langley was also a pioneer aviator. His first scale models flew in 1896. Powered by steam,they flew for up to 1200 metres. Larger,manned,versions failed to fly,he went on to design many later successful aircraft | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library |
| Taille de l’image : | 3506 px × 5029 px |
| Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
| Property Release : | Non requis |
| Restrictions : | - |
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