periscope


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periscope
Light enters the top lens of a periscope, reflects off a mirror set at a 45 degree angle, travels down the periscope tube, and reflects off a second mirror, also set at a 45 degree angle. Light that reflects off the second mirror exits through the bottom lens and into the eye of the user.

per·i·scope

 (pĕr′ĭ-skōp′)
n.
Any of various tubular optical instruments that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight.

per′i·scop′ic (-skŏp′ĭk), per′i·scop′i·cal (-ĭ-kəl) adj.

periscope

(ˈpɛrɪˌskəʊp)
n
any of a number of optical instruments that enable the user to view objects that are not in the direct line of vision, such as one in a submarine for looking above the surface of the water. They have a system of mirrors or prisms to reflect the light and often contain focusing lenses
[C19: from Greek periskopein to look around; see peri-, -scope]

per•i•scope

art at periosteum
(ˈpɛr əˌskoʊp)

n.
an optical instrument for viewing objects in an obstructed field of vision, consisting of a tube with an arrangement of prisms or mirrors and, usu., lenses: used esp. in submarines.
[1815–25; back formation from periscopic]
click for a larger image
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.

per·i·scope

(pĕr′ĭ-skōp′)
An instrument that has angled mirrors or prisms and allows objects not in the direct line of sight to be seen.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.periscope - an optical instrument that provides a view of an otherwise obstructed fieldperiscope - an optical instrument that provides a view of an otherwise obstructed field
optical instrument - an instrument designed to aid vision
pigboat, submarine, U-boat, sub - a submersible warship usually armed with torpedoes
Translations
بيرسكوب: مِنْظار الغَوّاصات والخَنادِق
periskop
periskop
periszkóp
sjónpípa, hringsjá
periskopas
periskops
periskop

periscope

[ˈperɪskəʊp] Nperiscopio m

periscope

[ˈpɛrɪskəʊp] npériscope m

periscope

nPeriskop nt

periscope

[ˈpɛrɪˌskəʊp] nperiscopio

periscope

(ˈperiskəup) noun
a tube containing mirrors, through which a person can look in order to see things which cannot be seen from the position the person is in, especially one used in submarines when under water to allow a person to see what is happening on the surface of the sea.
References in classic literature ?
At first they sought to discover his location in No Man's Land; but when an officer looking over the parapet through a periscope was struck full in the back of the head with a rifle bullet which passed through his skull and fell to the bottom of the trench they realized that it was beyond the parados rather than the parapet that they should search.
Hugging the parados, messengers carried the word in both directions and presently periscopes were leveled above the parados and keen eyes were searching out the traitor.
I rose, also, and over the ship's side, I saw not two hundred yards distant the periscope of a submarine, while racing toward the liner the wake of a torpedo was distinctly visible.
Ever since entering the U-boat zone we had been on the lookout for periscopes, and children that we were, bemoaning the unkind fate that was to see us safely into France on the morrow without a glimpse of the dread marauders.
Almost at their side the periscope of a submarine had suddenly appeared.
9, 2015 /PRNewswire/ -- The most popular user-generated live streaming event comes to San Francisco January 14-17 for the second Periscope Community Summit, a gathering that will feature technology expertise, social media connections, music and camaraderie.
The conference sessions are presented using Periscope, Twitter's live video streaming mobile application.
ySTANBUL (CyHAN)- A Turkish teacher known as "Ekol Hoca" who has been providing online lessons to students, especially those preparing for nationwide exams amid government's efforts to shut down prep schools, via live video streaming application Periscope has said his YouTube channel was suspended probably over political reasons.
The apps Periscope (exclusive to Twitter) and Meerkat each make available free, real-time, live video streaming through IOS or Android smartphones.
Plus, Periscope appeals to the Snapchat crowd because "scopes" disappear after 24 hours, so there's no need to worry about a video from years ago hanging around or blotting your digital history.
The UAE's telecoms regulator says access to the Periscope app has been restored after a "technical problem" led to the service going down this week.