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- An instrument that has angled mirrors or prisms and allows objects not in the direct line of sight to be seen, often used on submarines and in military reconnaissance.
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A periscope is an instrument for observation over, around or through an object, obstacle or condition that prevents direct line-of-sight observation from an observer's current position. [ 1 ] [ 2 ] In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45° angle.
periscope. noun [ C ] us / ˈper·əˌskoʊp /. Add to word list. a vertical tube containing mirrors that can give you a view of what is above you when you look through the bottom of the tube: The periscope of the submarine was visible just above the surface of the water. (Definition of periscope from the Cambridge Academic Content Dictionary ...
Down Periscope is a 1996 American military comedy submarine film directed by David S. Ward, produced by Robert Lawrence, and starring Kelsey Grammer, Lauren Holly, and Rob Schneider along with Bruce Dern, Harry Dean Stanton, William H. Macy, and Rip Torn in supporting roles.
Periscope, optical instrument used in land and sea warfare, submarine navigation, and elsewhere to enable an observer to see his surroundings while remaining under cover, behind armour, or submerged. A periscope includes two mirrors or reflecting prisms to change the direction of the light coming.
- The Editors of Encyclopaedia Britannica
A tubular arrangement of lenses and mirrors, or prisms, that allows the viewer to see around barriers or to obtain a view from a level other than that of the eye is called a periscope. The simple periscope used by a child to look at a parade over the heads of a crowd is based on this principle.
noun. an optical instrument for viewing objects that are above the level of direct sight or in an otherwise obstructed field of vision, consisting essentially of a tube with an arrangement of prisms or mirrors and, usually, lenses: used especially in submarines. a periscopic lens.
periscope. Light enters the top lens of the periscope, reflects off a mirror set at a 45° angle, travels down the periscope tube, and reflects off a second mirror, also set at a 45° angle. The light that reflects off the second mirror exits through the bottom lens and into the eye of the user.
