Open Sesame Science
Exploration Center

::: People in an underwater submarine can see ships on the surface of the sea through the periscope. Then can you see what is behind the wall?

There is a set of plane mirrors placed 45 degrees slant inside the periscope. The light of the target object reaches the first plane mirror and is reflected downwards to the second plane mirror, and then reflected again to our eyes.

People in an underwater submarine can see ships on the surface of the sea through the periscope. Then can you see what is behind the wall? There is a set of plane mirrors placed 45 degrees slant inside the periscope. The light of the target object reaches the first plane mirror and is reflected downwards to the second plane mirror, and then reflected again to our eyes.