Illustration showing the workings of a periscope. A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation. In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45 degree angle. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4193 px × 4193 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |