{"id":87542,"date":"2025-06-01T06:47:17","date_gmt":"2025-06-01T06:47:17","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87542"},"modified":"2025-06-01T06:47:17","modified_gmt":"2025-06-01T06:47:17","slug":"which-one-of-the-following-is-the-natural-phenomenon-based-on-which-a","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-natural-phenomenon-based-on-which-a\/","title":{"rendered":"Which one of the following is the natural phenomenon based on which a"},"content":{"rendered":"

Which one of the following is the natural phenomenon based on which a simple periscope works ?<\/p>\n

[amp_mcq option1=”Reflection of light” option2=”Refraction of light” option3=”Dispersion of light” option4=”Total internal reflection of light” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nA simple periscope uses two plane mirrors to change the direction of light rays. The mirrors are typically placed parallel to each other at an angle of 45 degrees to the main tube. Light rays from the object travel to the top mirror, are reflected downwards, travel through the tube, and are then reflected by the bottom mirror towards the observer’s eye. This bouncing of light rays off the mirrors is due to the phenomenon of reflection of light.
\n<\/section>\n
\n– A simple periscope allows observation of objects located above or below the observer’s direct line of sight.
\n– It utilizes plane mirrors placed at angles to redirect light.
\n– The change in direction of light upon hitting a mirror surface is called reflection.
\n<\/section>\n
\nMore advanced periscopes, like those used in submarines, may also incorporate lenses and prisms (which use reflection or total internal reflection) to provide magnification, a wider field of view, and optical stability, but the fundamental principle in a simple periscope is reflection from plane mirrors.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is the natural phenomenon based on which a simple periscope works ? [amp_mcq option1=”Reflection of light” option2=”Refraction of light” option3=”Dispersion of light” option4=”Total internal reflection of light” correct=”option1″] This question was previously asked in UPSC NDA-1 – 2018 Download PDFAttempt Online A simple periscope uses two plane mirrors to change … <\/p>\n

Detailed SolutionWhich one of the following is the natural phenomenon based on which a<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1114,1153,1128],"class_list":["post-87542","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1114","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is the natural phenomenon based on which a<\/title>\n<meta name=\"description\" content=\"A simple periscope uses two plane mirrors to change the direction of light rays. The mirrors are typically placed parallel to each other at an angle of 45 degrees to the main tube. Light rays from the object travel to the top mirror, are reflected downwards, travel through the tube, and are then reflected by the bottom mirror towards the observer's eye. This bouncing of light rays off the mirrors is due to the phenomenon of reflection of light. - A simple periscope allows observation of objects located above or below the observer's direct line of sight. - It utilizes plane mirrors placed at angles to redirect light. - The change in direction of light upon hitting a mirror surface is called reflection.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-natural-phenomenon-based-on-which-a\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following is the natural phenomenon based on which a\" \/>\n<meta property=\"og:description\" content=\"A simple periscope uses two plane mirrors to change the direction of light rays. The mirrors are typically placed parallel to each other at an angle of 45 degrees to the main tube. Light rays from the object travel to the top mirror, are reflected downwards, travel through the tube, and are then reflected by the bottom mirror towards the observer's eye. This bouncing of light rays off the mirrors is due to the phenomenon of reflection of light. - A simple periscope allows observation of objects located above or below the observer's direct line of sight. - It utilizes plane mirrors placed at angles to redirect light. - The change in direction of light upon hitting a mirror surface is called reflection.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-natural-phenomenon-based-on-which-a\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:47:17+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following is the natural phenomenon based on which a","description":"A simple periscope uses two plane mirrors to change the direction of light rays. 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