The periscope for its purpose is to look around the objects. In greek , 'peri' means around and 'scopus' means to look . hence the name.
On the newer class submarines that don't employ optics, they're called "Photonics Masts". But it's still a Periscope.
Periscope.
A periscope.
A periscope mirror is referred to as a "prism" or a "reflecting prism." It is the component used within a periscope to reflect light at a 90-degree angle, allowing for the viewing of objects that are not in direct line of sight.
a diagram of a periscope
someone discovered the periscope
well there really is no antonym that i know of for periscope because a periscope is an object.
a periscope
The periscope was invented in 1450 by Johann Gutenberg
The periscope was invented in 1450 by Johann Gutenberg.
Periscope Entertainment was created in 2004.
Periscope Life was created in 1980.