The periscope is an instrument for observation over, around or through the object, obstacle or condition that prevents direct line-of-sight observation from the observer’s current position, The periscope is used to monitor the dangerous...
Military robots are autonomous robots or remote-controlled devices which designed for military applications, They can walk through minefields, deactivate unexploded bombs or clear out hostile buildings.
Laws of light reflection The distance between the Earth and the Moon can be measured by the reflection of a laser beam directed from the Earth towards a reflection surface placed on the Moon...
The robots can perform the tasks which humans find dangerous, boring, or difficult, they can do the work with constant speed & precision, and they continue & finish the work without feeling sick, The...
