2007-02-04 23:21:01 · 5 answers · asked by awang ku mohd. usman u 1 in Social Science ➔ Other - Social Science
A periscope is an instrument for observation from a concealed position. In its simplest form it is a tube in each end of which are mirrors set parallel to each other and at an angle of 45° with respect to the line between them.
A periscope may be used as a toy or for seeing over people's heads in a crowd. This form of periscope, with the addition of two simple lenses, was used for observation purposes in the trenches during World War I. Periscopes are also used in some gun turrets and armoured vehicles.
More complex periscopes, using prisms instead of mirrors, and providing magnification, are used on submarines. The overall design of the classical submarine periscope is very simple: two telescopes pointed into each other. If the two telescopes have different individual magnification, the difference between them causes an overall magnification or reduction.
Hope that helps...
2007-02-05 00:00:12 · answer #1 · answered by Francis Alexander 2 · 0⤊ 0⤋
A periscope is an instrument for observation from a concealed position. In its simplest form it is a tube in each end of which are mirrors set parallel to each other and at an angle of 45° with respect to the line between them.
A periscope may be used as a toy or for seeing over people's heads in a crowd. This form of periscope, with the addition of two simple lenses, was used for observation purposes in the trenches during World War I. Periscopes are also used in some gun turrets and armoured vehicles.
More complex periscopes, using prisms instead of mirrors, and providing magnification, are used on submarines. The overall design of the classical submarine periscope is very simple: two telescopes pointed into each other. If the two telescopes have different individual magnification, the difference between them causes an overall magnification or reduction.
2007-02-05 07:24:32 · answer #2 · answered by DarkChoco 4 · 0⤊ 0⤋
a device that, through a series of mirrors and prisms, allows one to view something not directly in the line of sight. Periscopes are generally used on submarines to allow the sailors to see above the waterline
2007-02-05 07:31:40 · answer #3 · answered by Angel 4 · 0⤊ 0⤋
see the dictionary,but no need i will write it for you; Peri-scope/noun a device like a long tube, containing mirrors which enable the user to see over the top of sth, used especially in a SUBMARINE,and all so to see above the surface of the sea.
2007-02-09 03:58:37 · answer #4 · answered by ima 1 · 0⤊ 0⤋
i think it's a sort of telescope used by submarines so that they can see the surface of the water
2007-02-05 07:30:18 · answer #5 · answered by lian 2 · 0⤊ 0⤋