{"id":43808,"date":"2024-04-15T21:34:44","date_gmt":"2024-04-15T21:34:44","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=43808"},"modified":"2024-04-15T21:34:44","modified_gmt":"2024-04-15T21:34:44","slug":"in-index-guided-photonic-crystal-fiber-structure-the-dark-areas-are-air-holes-what-does-white-areas-suggests","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-index-guided-photonic-crystal-fiber-structure-the-dark-areas-are-air-holes-what-does-white-areas-suggests\/","title":{"rendered":"In index-guided photonic crystal fiber structure, the dark areas are air holes. What does white areas suggests?"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;Air&#8221; option2=&#8221;Silica&#8221; option3=&#8221;Water&#8221; option4=&#8221;Plasma&#8221; correct=&#8221;option1&#8243;]<!--more--><\/p>\n<p>The correct answer is: Silica.<\/p>\n<p>Index-guided photonic crystal fiber (PCF) is a type of optical fiber that uses a periodic variation in the refractive index of the core and cladding to confine light. The dark areas in the PCF structure are air holes, which provide a low-index region for light to propagate through. The white areas are silica, which has a higher refractive index than air. This difference in refractive index between the air holes and the silica cladding causes light to be guided along the axis of the fiber.<\/p>\n<p>Option A is incorrect because air is the material that fills the air holes in the PCF structure.<\/p>\n<p>Option B is incorrect because silica is the material that makes up the cladding of the PCF structure.<\/p>\n<p>Option C is incorrect because water is not a material that is used in PCF structures.<\/p>\n<p>Option D is incorrect because plasma is not a material that is used in PCF structures.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;Air&#8221; option2=&#8221;Silica&#8221; option3=&#8221;Water&#8221; option4=&#8221;Plasma&#8221; correct=&#8221;option1&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[684],"tags":[],"class_list":["post-43808","post","type-post","status-publish","format-standard","hentry","category-optical-communication","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>In index-guided photonic crystal fiber structure, the dark areas are air holes. 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