identify the device and satiets a) principal b) work c)uses don't spaam otherwise you have to pay for it
Answers
Answer:
Your answer is:-
Explanation:
It is a Periscope.
a. Principal:
A periscope is a useful example of the law of reflection at work. It's important that your mirrors are placed at a 45° angle, because light always reflects away from a mirror at the same angle that it hits it. In a periscope, light from an object strikes the top mirror at 45° and bounces off at the same angle.
b. Work:
It is used for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. ... This form of periscope, with the addition of two simple lenses, served for observation purposes in the trenches during World War I.
c. Uses:
●It is used in submarines to determine the distance of a torpedo and helps in deciding the right time for the attack.
●It is used in a nuclear reactor to observe the chemical reactions that are taking place.
●In military periscopes are used to observe from their hiding position.