{"id":86435,"date":"2025-06-01T03:46:55","date_gmt":"2025-06-01T03:46:55","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86435"},"modified":"2025-06-01T03:46:55","modified_gmt":"2025-06-01T03:46:55","slug":"which-one-of-the-following-statements-is-correct-regarding-the-travel","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-regarding-the-travel\/","title":{"rendered":"Which one of the following statements is correct regarding the travel"},"content":{"rendered":"

Which one of the following statements is correct regarding the travel of a light beam from a rare to a dense medium?<\/p>\n

[amp_mcq option1=”A light beam travelling from a rare medium to a dense medium slows down and bends towards the normal.” option2=”A light beam travelling from a rare medium to a dense medium speeds up and bends towards the normal.” option3=”A light beam travelling from a rare medium to a dense medium slows down and bends away from the normal.” option4=”A light beam travelling from a rare medium to a dense medium speeds up and bends away from the normal.” correct=”option1″]<\/p>\n

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UPSC CDS-2 – 2023<\/div>\n<\/div>\n
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When a light beam travels from a rarer medium (lower refractive index, e.g., air) to a denser medium (higher refractive index, e.g., glass or water), its speed decreases. This change in speed causes the light ray to bend unless it is incident normally to the surface.<\/section>\n
According to Snell’s Law of refraction (n\u2081 sin \u03b8\u2081 = n\u2082 sin \u03b8\u2082), where n\u2081 and n\u2082 are the refractive indices of the first and second media, and \u03b8\u2081 and \u03b8\u2082 are the angles of incidence and refraction respectively (measured from the normal). If light goes from a rarer medium (n\u2081) to a denser medium (n\u2082), then n\u2082 > n\u2081. For the equation to hold, sin \u03b8\u2082 must be less than sin \u03b8\u2081, which means \u03b8\u2082 < \u03b8\u2081 (for angles in the first quadrant). A smaller angle of refraction (\u03b8\u2082) compared to the angle of incidence (\u03b8\u2081) means the light ray bends towards the normal.<\/section>\n
Conversely, when light travels from a denser medium to a rarer medium, its speed increases, and it bends away from the normal. Refractive index is defined as the ratio of the speed of light in vacuum to the speed of light in the medium (n = c\/v). A denser medium has a higher refractive index and thus a lower speed of light.<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is correct regarding the travel of a light beam from a rare to a dense medium? [amp_mcq option1=”A light beam travelling from a rare medium to a dense medium slows down and bends towards the normal.” option2=”A light beam travelling from a rare medium to a dense medium speeds … <\/p>\n

Detailed SolutionWhich one of the following statements is correct regarding the travel<\/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":[1088],"tags":[1105,1153,1128],"class_list":["post-86435","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1105","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is correct regarding the travel<\/title>\n<meta name=\"description\" content=\"When a light beam travels from a rarer medium (lower refractive index, e.g., air) to a denser medium (higher refractive index, e.g., glass or water), its speed decreases. This change in speed causes the light ray to bend unless it is incident normally to the surface. According to Snell's Law of refraction (n\u2081 sin \u03b8\u2081 = n\u2082 sin \u03b8\u2082), where n\u2081 and n\u2082 are the refractive indices of the first and second media, and \u03b8\u2081 and \u03b8\u2082 are the angles of incidence and refraction respectively (measured from the normal). If light goes from a rarer medium (n\u2081) to a denser medium (n\u2082), then n\u2082 > n\u2081. For the equation to hold, sin \u03b8\u2082 must be less than sin \u03b8\u2081, which means \u03b8\u2082 < \u03b8\u2081 (for angles in the first quadrant). A smaller angle of refraction (\u03b8\u2082) compared to the angle of incidence (\u03b8\u2081) means the light ray bends towards the normal.\" \/>\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-statements-is-correct-regarding-the-travel\/\" \/>\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 statements is correct regarding the travel\" \/>\n<meta property=\"og:description\" content=\"When a light beam travels from a rarer medium (lower refractive index, e.g., air) to a denser medium (higher refractive index, e.g., glass or water), its speed decreases. This change in speed causes the light ray to bend unless it is incident normally to the surface. According to Snell's Law of refraction (n\u2081 sin \u03b8\u2081 = n\u2082 sin \u03b8\u2082), where n\u2081 and n\u2082 are the refractive indices of the first and second media, and \u03b8\u2081 and \u03b8\u2082 are the angles of incidence and refraction respectively (measured from the normal). If light goes from a rarer medium (n\u2081) to a denser medium (n\u2082), then n\u2082 > n\u2081. For the equation to hold, sin \u03b8\u2082 must be less than sin \u03b8\u2081, which means \u03b8\u2082 < \u03b8\u2081 (for angles in the first quadrant). A smaller angle of refraction (\u03b8\u2082) compared to the angle of incidence (\u03b8\u2081) means the light ray bends towards the normal.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-regarding-the-travel\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:46:55+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following statements is correct regarding the travel","description":"When a light beam travels from a rarer medium (lower refractive index, e.g., air) to a denser medium (higher refractive index, e.g., glass or water), its speed decreases. This change in speed causes the light ray to bend unless it is incident normally to the surface. According to Snell's Law of refraction (n\u2081 sin \u03b8\u2081 = n\u2082 sin \u03b8\u2082), where n\u2081 and n\u2082 are the refractive indices of the first and second media, and \u03b8\u2081 and \u03b8\u2082 are the angles of incidence and refraction respectively (measured from the normal). If light goes from a rarer medium (n\u2081) to a denser medium (n\u2082), then n\u2082 > n\u2081. For the equation to hold, sin \u03b8\u2082 must be less than sin \u03b8\u2081, which means \u03b8\u2082 < \u03b8\u2081 (for angles in the first quadrant). A smaller angle of refraction (\u03b8\u2082) compared to the angle of incidence (\u03b8\u2081) means the light ray bends towards the normal.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-regarding-the-travel\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is correct regarding the travel","og_description":"When a light beam travels from a rarer medium (lower refractive index, e.g., air) to a denser medium (higher refractive index, e.g., glass or water), its speed decreases. This change in speed causes the light ray to bend unless it is incident normally to the surface. According to Snell's Law of refraction (n\u2081 sin \u03b8\u2081 = n\u2082 sin \u03b8\u2082), where n\u2081 and n\u2082 are the refractive indices of the first and second media, and \u03b8\u2081 and \u03b8\u2082 are the angles of incidence and refraction respectively (measured from the normal). If light goes from a rarer medium (n\u2081) to a denser medium (n\u2082), then n\u2082 > n\u2081. For the equation to hold, sin \u03b8\u2082 must be less than sin \u03b8\u2081, which means \u03b8\u2082 < \u03b8\u2081 (for angles in the first quadrant). A smaller angle of refraction (\u03b8\u2082) compared to the angle of incidence (\u03b8\u2081) means the light ray bends towards the normal.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-regarding-the-travel\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:46:55+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-regarding-the-travel\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-regarding-the-travel\/","name":"Which one of the following statements is correct regarding the travel","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:46:55+00:00","dateModified":"2025-06-01T03:46:55+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"When a light beam travels from a rarer medium (lower refractive index, e.g., air) to a denser medium (higher refractive index, e.g., glass or water), its speed decreases. 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