Electric torch,coloured X-ray. The torch contains two batteries (black,centre and lower centre) for supplying electrical power to the bulb. This bulb (upper centre) is at the centre of a reflector,a bowl-shaped (parabolic) mirror that reflects light from the bulb and throws it forward,focussing it as a narrow beam of light for better visibility. A torch may have a switch,but many are now turned on and off by twisting the head on a screw-mounted and spring-loaded base to make contact with the batteries and adjust the focus of the beam | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gustoimages |
Bildgröße: | 2586 px × 6725 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |