{"id":88807,"date":"2025-06-01T07:21:35","date_gmt":"2025-06-01T07:21:35","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88807"},"modified":"2025-06-01T07:21:35","modified_gmt":"2025-06-01T07:21:35","slug":"twinkling-of-stars-is-primarily-due-to-the-atmospheric","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/","title":{"rendered":"Twinkling of stars is primarily due to the atmospheric"},"content":{"rendered":"

Twinkling of stars is primarily due to the atmospheric<\/p>\n

[amp_mcq option1=”refraction” option2=”reflection” option3=”polarization” option4=”dispersion” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is A) refraction.
\n<\/section>\n
\nTwinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth’s atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.
\n<\/section>\n
\nPlanets, being much closer than stars, appear as extended sources rather than point sources. The total amount of light entering the eye from a planet remains relatively constant despite atmospheric refraction, which is why planets do not appear to twinkle.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Twinkling of stars is primarily due to the atmospheric [amp_mcq option1=”refraction” option2=”reflection” option3=”polarization” option4=”dispersion” correct=”option1″] This question was previously asked in UPSC NDA-2 – 2021 Download PDFAttempt Online The correct answer is A) refraction. Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth’s atmosphere with varying densities … <\/p>\n

Detailed SolutionTwinkling of stars is primarily due to the atmospheric<\/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":[1094],"tags":[1110,1153,1128],"class_list":["post-88807","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1110","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nTwinkling of stars is primarily due to the atmospheric<\/title>\n<meta name=\"description\" content=\"The correct answer is A) refraction. Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth's atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.\" \/>\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\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Twinkling of stars is primarily due to the atmospheric\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A) refraction. Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth's atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:21:35+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":"Twinkling of stars is primarily due to the atmospheric","description":"The correct answer is A) refraction. Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth's atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.","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\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/","og_locale":"en_US","og_type":"article","og_title":"Twinkling of stars is primarily due to the atmospheric","og_description":"The correct answer is A) refraction. Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth's atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:21:35+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/","url":"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/","name":"Twinkling of stars is primarily due to the atmospheric","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:21:35+00:00","dateModified":"2025-06-01T07:21:35+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A) refraction. Twinkling of stars is caused by atmospheric refraction. As starlight passes through different layers of the Earth's atmosphere with varying densities and temperatures, it undergoes repeated refraction in random directions, causing the apparent position and brightness of the star to fluctuate.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/twinkling-of-stars-is-primarily-due-to-the-atmospheric\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-2\/"},{"@type":"ListItem","position":3,"name":"Twinkling of stars is primarily due to the atmospheric"}]},{"@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\/88807","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=88807"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88807\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88807"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88807"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}