{"id":53455,"date":"2023-07-31T22:40:19","date_gmt":"2023-07-31T17:10:19","guid":{"rendered":"https:\/\/www.practicemock.com\/blog\/?p=53455"},"modified":"2023-07-31T22:40:19","modified_gmt":"2023-07-31T17:10:19","slug":"ssc-je-2023-exam-surveying-what-is-optical-square","status":"publish","type":"post","link":"https:\/\/www.practicemock.com\/blog\/ssc-je-2023-exam-surveying-what-is-optical-square\/","title":{"rendered":"SSC JE 2023 Exam-Surveying: What is Optical Square?"},"content":{"rendered":"\n<p>Optical square is a marvelous device that can help you measure angles and set out right angles with ease. It is used in surveying, which is the art of measuring and mapping the land. But how does optical square work and what can you do with it? In this article, we will uncover the secrets of an optical square in an easy way. You will learn how to ace any question related to optical square with flair and precision. And don\u2019t forget to take a<a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\"> <strong>Free Mock Test<\/strong> <\/a>to test your knowledge and skills on this topic.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">Take 1 FREE SSC JE Civil Engineering 2023 Mock Test! And Discover How to Clear the Exam!<\/a><\/strong><\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Surveying: What is Optical Square?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"273\" height=\"545\" src=\"https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/image-24-1.png\" alt=\"\" class=\"wp-image-53459\"\/><\/figure>\n\n\n\n<p>An optical square is a tool utilized for establishing right angles. It comprises a compact circular metal box measuring 5 cm in diameter and 1.25 cm in depth, with a movable metal cover to shield the slits.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Principle of optical square<\/strong>:<\/h3>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"490\" height=\"383\" src=\"https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/image-25-1.png\" alt=\"\" class=\"wp-image-53461\"\/><\/figure>\n\n\n\n<p>The working principle of the optical square is based on the concept of reflecting surfaces, where the angle formed between the incident ray and the last reflected ray is twice the angle between the mirrors. In this particular optical square, the angle between the mirrors is a fixed 45 degrees, resulting in a 90-degree angle between the horizon sight and the index sight.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Construction of optical square<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>The construction of the optical square involves the placement of a horizon glass &#8220;H&#8221; at the bottom of the metal box. The lower half of the glass remains unsilvered, while the upper half is silvered.<\/li><li>Additionally, an index glass &#8220;I&#8221; is also fixed at the bottom of the box, fully silvered.<\/li><li>The angle between the index glass and horizon glass is maintained at 45 degrees.<\/li><li>The horizon glass is positioned at an angle of 120 degrees with the horizon sight, while the index glass is set at an angle of 105 degrees with the index sight.<\/li><\/ul>\n\n\n\n<p><strong>Q. The construction of an optical square is based on the principle of<\/strong><\/p>\n\n\n\n<p>(a) Reflection<\/p>\n\n\n\n<p>(b) Refraction<\/p>\n\n\n\n<p>(c) Double refraction<\/p>\n\n\n\n<p>(d) Double reflection<\/p>\n\n\n\n<p><strong>ANS: (d)<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SSC JE 2023 Mock Test for Ultimate Practice<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Day 1<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE SSC JE Civil Engineering&nbsp;2023 Free Mock Test<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 2<\/strong><\/td><td><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\"><strong>SSC JE Civil Engineering<\/strong>&nbsp;<strong>2023 Paper 1 Mock Test 1 Know your AIR &amp; Analyze Your Performance<\/strong><\/a><\/td><\/tr><tr><td><strong>Day 3<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 2<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 4<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 3<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 5<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 4<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 6<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 5<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 7<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 6<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 8<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 7<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 9<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 8<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 10<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 1 Mock Test 9<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 11<\/strong><\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 2 Mock Test 10<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 1<\/strong>2<\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 2 Mock Test 11<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 1<\/strong>3<\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 2 Mock Test 12<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 1<\/strong>4<\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 2 Mock Test 13<\/a><\/strong><\/td><\/tr><tr><td><strong>Day 1<\/strong>5<\/td><td><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">SSC JE Civil Engineering&nbsp;2023 Paper 2 Mock Test 14<\/a><\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong><a href=\"https:\/\/www.practicemock.com\/ssc-je-ce\/?ref=8417\">FREE SSC JE Civil Engineering 2023 Mock Test: Are You Ready for the Challenge? Find Out Now!<\/a><\/strong><\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Optical square is a marvelous device that can help you measure angles and set out right angles with ease. It is used in surveying, which is the art of measuring and mapping the land. But how does optical square work and what can you do with it? In this article, we will uncover the secrets [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":53464,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[2888],"tags":[],"class_list":["post-53455","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-jssc-je"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SSC JE 2023 Exam-Surveying: What is Optical Square? - Practicemock<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.practicemock.com\/blog\/ssc-je-2023-exam-surveying-what-is-optical-square\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SSC JE 2023 Exam-Surveying: What is Optical Square? - Practicemock\" \/>\n<meta property=\"og:description\" content=\"Optical square is a marvelous device that can help you measure angles and set out right angles with ease. 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In his free time, he either transforms into a sleep lover, devours books, or becomes an outdoor enthusiast.","url":"https:\/\/www.practicemock.com\/blog\/author\/asad-khanpracticemock-com\/"}]}},"uagb_featured_image_src":{"full":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",770,515,false],"thumbnail":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",150,100,false],"medium":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",300,201,false],"medium_large":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",640,428,false],"large":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",640,428,false],"1536x1536":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",770,515,false],"2048x2048":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",770,515,false],"web-stories-poster-portrait":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",640,428,false],"web-stories-publisher-logo":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",96,64,false],"web-stories-thumbnail":["https:\/\/www.practicemock.com\/blog\/wp-content\/uploads\/2023\/07\/FI_Templates_Asad-2023-07-31T223925.222-1.png",150,100,false]},"uagb_author_info":{"display_name":"Asad Yar Khan","author_link":"https:\/\/www.practicemock.com\/blog\/author\/asad-khanpracticemock-com\/"},"uagb_comment_info":284,"uagb_excerpt":"Optical square is a marvelous device that can help you measure angles and set out right angles with ease. It is used in surveying, which is the art of measuring and mapping the land. But how does optical square work and what can you do with it? In this article, we will uncover the secrets&hellip;","_links":{"self":[{"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/posts\/53455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/comments?post=53455"}],"version-history":[{"count":0,"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/posts\/53455\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/media\/53464"}],"wp:attachment":[{"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/media?parent=53455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/categories?post=53455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.practicemock.com\/blog\/wp-json\/wp\/v2\/tags?post=53455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}