{"id":88472,"date":"2025-06-01T07:11:52","date_gmt":"2025-06-01T07:11:52","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88472"},"modified":"2025-06-01T07:11:52","modified_gmt":"2025-06-01T07:11:52","slug":"consider-the-following-statements-about-a-microscope-and-a-telescope","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/","title":{"rendered":"Consider the following statements about a microscope and a telescope :"},"content":{"rendered":"<p>Consider the following statements about a microscope and a telescope :<\/p>\n<ul>\n<li>Both the eyepiece and the objective of a microscope are convex lenses.<\/li>\n<li>The focal length of the objective of a telescope is larger than the focal length of its eyepiece.<\/li>\n<li>The magnification of a telescope increases with the increase in focal length of its objective.<\/li>\n<li>The magnification of a microscope increases with the increase in focal length of its objective.<\/li>\n<\/ul>\n<p>Which of the statements given above are correct?<\/p>\n<p>[amp_mcq option1=&#8221;1 and 3 only&#8221; option2=&#8221;1 and 4&#8243; option3=&#8221;2, 3 and 4&#8243; option4=&#8221;1, 2 and 3&#8243; correct=&#8221;option4&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC NDA-2 &#8211; 2018<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-nda-2-2018.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-nda-2-2018\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nStatements 1, 2, and 3 are correct.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nMicroscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\n1. Both the eyepiece and the objective of a microscope are convex lenses: Correct for a standard compound microscope.<br \/>\n2. The focal length of the objective of a telescope is larger than the focal length of its eyepiece: Correct for a refracting telescope, this arrangement helps achieve significant angular magnification.<br \/>\n3. The magnification of a telescope increases with the increase in focal length of its objective: Correct. For a refracting telescope, angular magnification is approximately the ratio of the objective&#8217;s focal length to the eyepiece&#8217;s focal length (M \u2248 f_objective \/ f_eyepiece). Increasing f_objective increases magnification.<br \/>\n4. The magnification of a microscope increases with the increase in focal length of its objective: Incorrect. For a compound microscope, the magnification produced by the objective is inversely proportional to its focal length (Magnification_objective \u2248 L\/f_objective, where L is the distance between lenses). Therefore, increasing the focal length of the objective decreases the magnification.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Consider the following statements about a microscope and a telescope : Both the eyepiece and the objective of a microscope are convex lenses. The focal length of the objective of a telescope is larger than the focal length of its eyepiece. The magnification of a telescope increases with the increase in focal length of its &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Consider the following statements about a microscope and a telescope :\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/#more-88472\">Detailed Solution<span class=\"screen-reader-text\">Consider the following statements about a microscope and a telescope :<\/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":[1114,1153,1128],"class_list":["post-88472","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1114","tag-optics","tag-physics","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>Consider the following statements about a microscope and a telescope :<\/title>\n<meta name=\"description\" content=\"Statements 1, 2, and 3 are correct. Microscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.\" \/>\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\/consider-the-following-statements-about-a-microscope-and-a-telescope\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consider the following statements about a microscope and a telescope :\" \/>\n<meta property=\"og:description\" content=\"Statements 1, 2, and 3 are correct. Microscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:11:52+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":"Consider the following statements about a microscope and a telescope :","description":"Statements 1, 2, and 3 are correct. Microscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.","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\/consider-the-following-statements-about-a-microscope-and-a-telescope\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following statements about a microscope and a telescope :","og_description":"Statements 1, 2, and 3 are correct. Microscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:11:52+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\/consider-the-following-statements-about-a-microscope-and-a-telescope\/","url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/","name":"Consider the following statements about a microscope and a telescope :","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:11:52+00:00","dateModified":"2025-06-01T07:11:52+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statements 1, 2, and 3 are correct. Microscopes and telescopes are optical instruments that use lenses (or mirrors) to produce magnified images. A compound microscope typically uses two convex lenses (objective and eyepiece). A refracting telescope uses an objective lens (usually convex) and an eyepiece lens (convex or concave). The magnification properties depend on the focal lengths and arrangement of the lenses.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-microscope-and-a-telescope\/#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":"Consider the following statements about a microscope and a telescope :"}]},{"@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\/88472","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=88472"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88472\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}