{"id":87697,"date":"2025-06-01T06:51:27","date_gmt":"2025-06-01T06:51:27","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87697"},"modified":"2025-06-01T06:51:27","modified_gmt":"2025-06-01T06:51:27","slug":"when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/","title":{"rendered":"When a beam of white light passes through a glass prism, the colour of"},"content":{"rendered":"

When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is<\/p>\n

[amp_mcq option1=”Blue” option2=”Red” option3=”Green” option4=”Violet” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct option is B) Red. When white light passes through a glass prism, red light deviates the least.
\n<\/section>\n
\n– When white light passes through a prism, it undergoes dispersion, splitting into its constituent colors because the refractive index of the prism material is different for different wavelengths (colors) of light.
\n– This phenomenon is called dispersion. The spectrum of white light in order of increasing wavelength (and decreasing frequency) is Violet, Indigo, Blue, Green, Yellow, Orange, Red (VIBGYOR).
\n– The deviation experienced by light passing through a prism is related to the refractive index of the material for that color. Generally, refractive index decreases with increasing wavelength.
\n– Longer wavelengths (like red) are refracted less, meaning they deviate less from their original path.
\n– Shorter wavelengths (like violet) are refracted more, meaning they deviate the most.
\n– Therefore, red light deviates the least, and violet light deviates the most.
\n<\/section>\n
\nThe angle of deviation (\u03b4) for a prism is related to the angle of incidence, angle of the prism (A), and the refractive index (\u03bc) of the prism material by complex formulas, but generally, for a given prism angle and angle of incidence, a higher refractive index leads to a greater angle of deviation. Since \u03bc is higher for shorter wavelengths (violet) and lower for longer wavelengths (red), violet deviates more than red. This is why the colors are separated when white light passes through a prism.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

When a beam of white light passes through a glass prism, the colour of light beam that deviates the least is [amp_mcq option1=”Blue” option2=”Red” option3=”Green” option4=”Violet” correct=”option2″] This question was previously asked in UPSC NDA-1 – 2019 Download PDFAttempt Online The correct option is B) Red. When white light passes through a glass prism, red … <\/p>\n

Detailed SolutionWhen a beam of white light passes through a glass prism, the colour of<\/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":[1119,1153,1128],"class_list":["post-87697","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1119","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhen a beam of white light passes through a glass prism, the colour of<\/title>\n<meta name=\"description\" content=\"The correct option is B) Red. When white light passes through a glass prism, red light deviates the least. - When white light passes through a prism, it undergoes dispersion, splitting into its constituent colors because the refractive index of the prism material is different for different wavelengths (colors) of light. - This phenomenon is called dispersion. The spectrum of white light in order of increasing wavelength (and decreasing frequency) is Violet, Indigo, Blue, Green, Yellow, Orange, Red (VIBGYOR). - The deviation experienced by light passing through a prism is related to the refractive index of the material for that color. Generally, refractive index decreases with increasing wavelength. - Longer wavelengths (like red) are refracted less, meaning they deviate less from their original path. - Shorter wavelengths (like violet) are refracted more, meaning they deviate the most. - Therefore, red light deviates the least, and violet light deviates the most.\" \/>\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\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When a beam of white light passes through a glass prism, the colour of\" \/>\n<meta property=\"og:description\" content=\"The correct option is B) Red. When white light passes through a glass prism, red light deviates the least. - When white light passes through a prism, it undergoes dispersion, splitting into its constituent colors because the refractive index of the prism material is different for different wavelengths (colors) of light. - This phenomenon is called dispersion. The spectrum of white light in order of increasing wavelength (and decreasing frequency) is Violet, Indigo, Blue, Green, Yellow, Orange, Red (VIBGYOR). - The deviation experienced by light passing through a prism is related to the refractive index of the material for that color. Generally, refractive index decreases with increasing wavelength. - Longer wavelengths (like red) are refracted less, meaning they deviate less from their original path. - Shorter wavelengths (like violet) are refracted more, meaning they deviate the most. - Therefore, red light deviates the least, and violet light deviates the most.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:51:27+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":"When a beam of white light passes through a glass prism, the colour of","description":"The correct option is B) Red. 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Generally, refractive index decreases with increasing wavelength. - Longer wavelengths (like red) are refracted less, meaning they deviate less from their original path. - Shorter wavelengths (like violet) are refracted more, meaning they deviate the most. - Therefore, red light deviates the least, and violet light deviates the most.","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\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/","og_locale":"en_US","og_type":"article","og_title":"When a beam of white light passes through a glass prism, the colour of","og_description":"The correct option is B) Red. 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Generally, refractive index decreases with increasing wavelength. - Longer wavelengths (like red) are refracted less, meaning they deviate less from their original path. - Shorter wavelengths (like violet) are refracted more, meaning they deviate the most. - Therefore, red light deviates the least, and violet light deviates the most.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/when-a-beam-of-white-light-passes-through-a-glass-prism-the-colour-of\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-1\/"},{"@type":"ListItem","position":3,"name":"When a beam of white light passes through a glass prism, the colour of"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=87697"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87697\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=87697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=87697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=87697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}