Gas street lighting. Close-up of a gas-powered street lamp. This operates using a set of gas mantles that glow and emit light when heated by a gas flame. The mantles are small pockets of silk or fabric impregnated with rare-earth metallic salts. When heated in a flame,these convert to solid oxides that glow brightly in the visible spectrum and emit relatively little heat | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Bartel, Alex |
Bildgröße: | 3416 px × 5124 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |