they use diffrent mirrors
the mirrors of a periscope have gotten bigger and are easier to see out of.
The periscope was invented in 1450 by Johann Gutenberg. He invented the periscope so that people could see over people's heads in crowds. In World War I the design was perfected and used so that people could see up and around the corners from their hiding places
The periscope was invented in the 19th century in England by Sir Howard Grubb. It was further developed and utilized in submarines for navigation and observation underwater.
To use a periscope to look over a wall, you would place the periscope on top of the wall and then look into the eyepiece at the other end. The mirrors inside the periscope will reflect the view from above the wall down to your eye, allowing you to see over the wall without exposing yourself.
An early form of the periscope was used to see over the tops of the trenches.
The word "periscope" is a noun. It refers to a device used for seeing over obstacles or around corners, typically by the use of mirrors and lenses.
periscope.
A periscope will let you see up and over the crowd which lets you see the game.
periscope
To see over walls and in submarines
Periscopes were used in both WW1 and WW2. They were used on submarines and in the trenches. It was dangerous to look over the top of a trench so soldiers developed "trench periscopes".
Early examples Johann Gutenberg, better known for his contribution to printing technology, marketed a periscope in the 1430s to enable pilgrims to see over the heads of the crowd at the vigintennial religious festival at Aachen. Simon Lake used periscopes in his submarines in 1902