Скачать с ютуб How to Make Periscope | Science Project | DIY Periscope в хорошем качестве

How to Make Periscope | Science Project | DIY Periscope

In this Project we learn How to Make Periscope. periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. Any one can make this periscope for their science project. This is very easy. Military personnel also use periscopes in some gun turrets and in armoured vehicles. In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle. #creativefest