You can only unlock the chapter using a special code that we will send you via the Viber app. Receiving a message is free of charge and with no obligations.
My phone number:
Get a code
In compliance with the law, persons under the age of 15 can enter their phone number only in the presence of a parent or guardian.
4-character code:
Check the received code
The page will be refreshed automatically in a few seconds.
A periscope is an optical device that allows us to see objects obscured by an obstacle. It also makes it possible to observe ships at sea level from partially submerged submarines. Explain the operation of the periscope.
The detailed solution steps are locked. Click on the blue button to unlock them.
A periscope is a device made of a double-curved tube and two flat mirrors. Mirrors are used for the parallel movement of rays, which allows us to observe obscured objects that are not directly in sight.
To view the solution, you need to log in.
You must confirm your username (email address) to view the solution.
To ensure the proper functioning of the website, OpenProf uses cookies that do not store personal data. By continuing to use the website, you agree to cookies. Tell me more »
