- published: 09 Apr 2015
- views: 172824
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.
In its simplest form, it consists of an outer case with mirrors at each end set parallel to each other at a 45-degree angle. This form of periscope, with the addition of two simple lenses, served for observation purposes in the trenches during World War I. Military personnel also use periscopes in some gun turrets and in armoured vehicles.
More complex periscopes, using prisms and/or advanced fiber optics instead of mirrors, and providing magnification, operate on submarines and in various fields of science. 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.
Johannes Gutenberg, known for his contribution to printing technology, marketed a kind of periscope in the 1430s to enable pilgrims to see over the heads of the crowd at the vigintennial religious festival at Aachen. Johannes Hevelius described an early periscope with lenses in 1647 in his work Selenographia, sive Lunae descriptio [Selenography, or an account of the Moon]. Hevelius saw military applications for his invention.
Watch this step by step tutorials to learn that, how to make a simple Periscope using cardboard at home. Thank you for Watching. Subscribe to our How-to-Raju Channel here: https://www.youtube.com/user/sachinsfanrajkumar Visit our website: http://www.howtoraju.com/
Checking out the latest live streaming social media app, Periscope. Is this the next big thing in social media? FOLLOW ME ON PERISCOPE FOR LIVE VIDEOS! @karlconrad Subscribe to the channel! www.youtube.com/karlconrad Follow me on the social media links! Facebook: http://www.facebook.com/twomobile Twitter: http://www.twitter.com/karlconrad Instagram: http://www.instagram.com/karlconrad Google + https://plus.google.com/+KarlConrad/ Snapchat: karl.conrad
The film gives instruction for making of periscope to participants of Summer Vacation Camps.To print periscope design click https://drive.google.com/file/d/0B1eY--Y_1FtxU2pXM0FhODExeVU/view?usp=sharing For Size of Mirror:https://drive.google.com/file/d/0B1eY--Y_1Ftxc2lkWG9DaFIyejA/view?usp=sharing Visit INnovationnscd for Making Speaker out of waste,Simple electric motor etc.
SUSCRÍBETE. ------------------------ Sobre el documento del CISEN. Nota de Proceso: http://www.proceso.com.mx/469540/amlo-promotores-antigasolinazo-edomex-mayor-riesgo-pf ------------------------ Facebook: http://www.facebook.com/FernandezNorona Twitter: http://www.twitter.com/FernandezNorona ------------------------ Grabado y Editado por @NakamuraMx
Moi le soir je traîne sur periscope et je trouve des gens bizarres sur des live bizarres. DEVIENS UNE VRAIE BAGUETTE TRADITION 2.0, ABONNE TOI ! : → FACEBOOK : http://bit.ly/FacebookAmixem → TWITTER : http://bit.ly/AmixemTwitter → TWITCH : http://bit.ly/TwitchAmixem → GOOGLE+ : https://plus.google.com/+FPSCoopGameplays ME SOUTENIR : → FAIRE UN DON : http://bit.ly/LeDonDesFamilles → SUBSCRIBE TWITCH : http://bit.ly/subaguette SERVEUR ALTIS LIFE COOPGAMEPLAYS : → FORUM, WIKI, TEAMSPEAK : http://bit.ly/CoopGameplaysServeur MUSIQUE D'INTRO : → "Thrift Shop (Bart & Baker Electro Swing Remix) - Postmodern Jukebox" : → YouTube : http://www.youtube.com/watch?v=bDlC9m1FDo4 → iTunes : https://itunes.apple.com/us/album/introducing-postmodern-jukebox/id636865845 CONFIG : → GTX 770, i5 3570K...
Popping my Periscope Cherry, this video is a walk through using Periscope both as a participant and as a publisher (broadcaster) Sue B Zimmerman joins me, @theinstagramexpert on Twitter and Instagram, AND Periscope! Do you want more videos with Steve? Click here to subscribe to our YouTube Channel! http://www.youtube.com/subscription_center?add_user=dottotech Check out Steve's excellent online free workshops Do you want to learn more about EVERNOTE? Here is a free tutorial http://www.dottotech.com/sep-od-sf-1/ Email Overload? Let me help! 3 Steps to Inbox Zero - www.dottotech.com/3steps About Steve Steve Dotto is a long time host and executive producer of Dotto Tech, Canada's longest-running technology TV show. After 15 years on national television, Steve now delivers his advice and...
I am just a regular one and I broke my key
Standing outside in front of my door, why has it always
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Ain’t got no money, can’t pay a guy, there must be some
way to get inside
Climb up the gutter – break my neck? Break up the door? –
can’t close it no more
Always me
Hey I am just a regular guy but I broke my key
Broke up the keybit, can’t open the door, why does it
have to be me?
And I wanna ... get inside
I don’t wanna... stay outside tonight
And I wanna... get into my bed
I don’t wanna... sleep outside my flat