{"id":13024,"date":"2023-07-12T07:51:55","date_gmt":"2023-07-12T02:21:55","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=13024"},"modified":"2025-04-01T23:42:15","modified_gmt":"2025-04-01T18:12:15","slug":"what-is-a-periscope","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/what-is-a-periscope\/","title":{"rendered":"What is a Periscope?"},"content":{"rendered":"<h2><strong>About Periscope:<\/strong><\/h2>\n<p>&nbsp;<\/p>\n<ul>\n<li>It is an <strong>optical instrument<\/strong> used in land and sea warfare, submarine navigation, and elsewhere to <strong>enable an observer to see his surroundings while remaining undercover, behind armor, or submerged.<\/strong><\/li>\n<li><strong>Submarines have periscopes<\/strong> so that people inside <strong>can see what is on the surface of the water.<\/strong><\/li>\n<\/ul>\n<h3>\u00a0<\/h3>\n<h3>Construction and Working Principle:<\/h3>\n<ul>\n<li>Periscopes can be <strong>constructed using a pair of flat mirrors or prisms<\/strong> and a <strong>rectangular hollow tube that has a viewing window at the top and bottom of the tube.\u00a0<\/strong><\/li>\n<li>The <strong>mirrors <\/strong>within this structure <strong>are fixed at an angle of 45o at the two ends of the rectangular hollow.<\/strong><\/li>\n<li>A periscope is a useful <strong>example of the law of reflection at work.<\/strong> It\u2019s important that your <strong>mirrors are placed at a 45\u00b0 angle,<\/strong> b<strong>ecause light always reflects away from a mirror at the same angle that it hits it.\u00a0<\/strong><\/li>\n<li><strong>In a periscope, light from an object strikes the top mirror at 45\u00b0 and bounces off at the same angle.\u00a0<\/strong><\/li>\n<li><strong>This sends light directly down the tube and onto the lower mirror.<\/strong> This mirror, <strong>also at a 45\u00b0 angle, reflects light directly to your eye.\u00a0<\/strong><\/li>\n<li>A si<strong>mple periscope only requires mirrors<\/strong>, whereas a <strong>more complicated periscope utilizes prisms rather than mirrors.\u00a0<\/strong><\/li>\n<li>The <strong>periscopes used in submarine applications are complex, <\/strong>typically requiring the use of tubes that are at least 10 meters in length to achieve a greater range of scope.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3>Q1)\u00a0What is the Central Scientific Instruments Organisation (CSIO)?<\/h3>\n<p>CSIO Chandigarh, is a constituent laboratory of the Council of Scientific &amp; Industrial Research (CSIR), a national laboratory dedicated to research, design and development of scientific and industrial instruments. It is a multi-disciplinary and multi-dimensional apex industrial research &amp; development organization in the country to stimulate growth of the Instrument Industry in India covering a wide range of applications.<\/p>\n<p><strong>Source:<\/strong>\u00a0<a href=\"https:\/\/www.tribuneindia.com\/news\/chandigarh\/in-a-first-navy-submarine-periscope-refurbished-at-csio-524905\" target=\"_blank\" rel=\"nofollow noopener\"><u>In a first, Navy submarine periscope refurbished at CSIO<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Periscope is an optical instrument that enables an observer to see his surroundings while remaining undercover.<\/p>\n","protected":false},"author":5,"featured_media":13025,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-13024","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/13024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=13024"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/13024\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/13025"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=13024"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=13024"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=13024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}