{"id":90206,"date":"2025-06-01T10:22:53","date_gmt":"2025-06-01T10:22:53","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90206"},"modified":"2025-06-01T10:22:53","modified_gmt":"2025-06-01T10:22:53","slug":"which-of-the-following-statements-about-optical-microscope-is-are-corr","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/","title":{"rendered":"Which of the following statements about optical microscope is\/are corr"},"content":{"rendered":"<p>Which of the following statements about optical microscope is\/are correct?<\/p>\n<ul>\n<li>1. Both the eyepiece and objective of a microscope are convex lenses.<\/li>\n<li>2. The magnification of a microscope increases with increase in focal length of the objective.<\/li>\n<li>3. The magnification of a microscope depends upon the length of the microscope tube.<\/li>\n<li>4. The eyepiece of a microscope is a concave lens.<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below.<\/p>\n<p>[amp_mcq option1=&#8221;1 and 3&#8243; option2=&#8221;3 only&#8221; option3=&#8221;3 and 4&#8243; option4=&#8221;1, 2 and 4&#8243; correct=&#8221;option1&#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 CAPF &#8211; 2018<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-capf-2018.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-capf-2018\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe correct answer is A) 1 and 3.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nStatement 1 is correct: In a standard compound optical microscope, both the objective lens (or lens system) and the eyepiece lens (or lens system) act as convex lenses to produce magnification. The objective creates a magnified real intermediate image, and the eyepiece magnifies this intermediate image to form a virtual final image.<br \/>\nStatement 2 is incorrect: The magnification of the objective lens is inversely proportional to its focal length. A shorter focal length objective provides higher magnification (and typically lower depth of field and working distance).<br \/>\nStatement 3 is correct: The overall magnification of a compound microscope is approximately the product of the magnification of the objective and the magnification of the eyepiece. The magnification provided by the objective is related to the distance between the objective and the intermediate image (which is determined by the microscope&#8217;s tube length) and the focal length of the objective. Thus, the length of the microscope tube affects the magnification.<br \/>\nStatement 4 is incorrect: As mentioned in statement 1, the eyepiece acts as a magnifying glass, which is achieved using a convex lens or a combination of lenses that function as a convex lens.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe total magnification of a compound microscope is typically calculated as M_total = M_objective \u00d7 M_eyepiece. The objective magnification is often given by M_objective \u2248 L \/ f_objective, where L is the mechanical tube length and f_objective is the focal length of the objective. This confirms that tube length (L) affects the magnification.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following statements about optical microscope is\/are correct? 1. Both the eyepiece and objective of a microscope are convex lenses. 2. The magnification of a microscope increases with increase in focal length of the objective. 3. The magnification of a microscope depends upon the length of the microscope tube. 4. The eyepiece of &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which of the following statements about optical microscope is\/are corr\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/#more-90206\">Detailed Solution<span class=\"screen-reader-text\">Which of the following statements about optical microscope is\/are corr<\/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":[1085],"tags":[1114,1153,1128],"class_list":["post-90206","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","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>Which of the following statements about optical microscope is\/are corr<\/title>\n<meta name=\"description\" content=\"The correct answer is A) 1 and 3. Statement 1 is correct: In a standard compound optical microscope, both the objective lens (or lens system) and the eyepiece lens (or lens system) act as convex lenses to produce magnification. The objective creates a magnified real intermediate image, and the eyepiece magnifies this intermediate image to form a virtual final image. Statement 2 is incorrect: The magnification of the objective lens is inversely proportional to its focal length. A shorter focal length objective provides higher magnification (and typically lower depth of field and working distance). Statement 3 is correct: The overall magnification of a compound microscope is approximately the product of the magnification of the objective and the magnification of the eyepiece. The magnification provided by the objective is related to the distance between the objective and the intermediate image (which is determined by the microscope&#039;s tube length) and the focal length of the objective. Thus, the length of the microscope tube affects the magnification. Statement 4 is incorrect: As mentioned in statement 1, the eyepiece acts as a magnifying glass, which is achieved using a convex lens or a combination of lenses that function as a convex lens.\" \/>\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-of-the-following-statements-about-optical-microscope-is-are-corr\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following statements about optical microscope is\/are corr\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A) 1 and 3. Statement 1 is correct: In a standard compound optical microscope, both the objective lens (or lens system) and the eyepiece lens (or lens system) act as convex lenses to produce magnification. The objective creates a magnified real intermediate image, and the eyepiece magnifies this intermediate image to form a virtual final image. Statement 2 is incorrect: The magnification of the objective lens is inversely proportional to its focal length. A shorter focal length objective provides higher magnification (and typically lower depth of field and working distance). Statement 3 is correct: The overall magnification of a compound microscope is approximately the product of the magnification of the objective and the magnification of the eyepiece. The magnification provided by the objective is related to the distance between the objective and the intermediate image (which is determined by the microscope&#039;s tube length) and the focal length of the objective. Thus, the length of the microscope tube affects the magnification. Statement 4 is incorrect: As mentioned in statement 1, the eyepiece acts as a magnifying glass, which is achieved using a convex lens or a combination of lenses that function as a convex lens.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:22:53+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 of the following statements about optical microscope is\/are corr","description":"The correct answer is A) 1 and 3. Statement 1 is correct: In a standard compound optical microscope, both the objective lens (or lens system) and the eyepiece lens (or lens system) act as convex lenses to produce magnification. The objective creates a magnified real intermediate image, and the eyepiece magnifies this intermediate image to form a virtual final image. Statement 2 is incorrect: The magnification of the objective lens is inversely proportional to its focal length. A shorter focal length objective provides higher magnification (and typically lower depth of field and working distance). Statement 3 is correct: The overall magnification of a compound microscope is approximately the product of the magnification of the objective and the magnification of the eyepiece. The magnification provided by the objective is related to the distance between the objective and the intermediate image (which is determined by the microscope's tube length) and the focal length of the objective. Thus, the length of the microscope tube affects the magnification. Statement 4 is incorrect: As mentioned in statement 1, the eyepiece acts as a magnifying glass, which is achieved using a convex lens or a combination of lenses that function as a convex lens.","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-of-the-following-statements-about-optical-microscope-is-are-corr\/","og_locale":"en_US","og_type":"article","og_title":"Which of the following statements about optical microscope is\/are corr","og_description":"The correct answer is A) 1 and 3. Statement 1 is correct: In a standard compound optical microscope, both the objective lens (or lens system) and the eyepiece lens (or lens system) act as convex lenses to produce magnification. The objective creates a magnified real intermediate image, and the eyepiece magnifies this intermediate image to form a virtual final image. Statement 2 is incorrect: The magnification of the objective lens is inversely proportional to its focal length. A shorter focal length objective provides higher magnification (and typically lower depth of field and working distance). Statement 3 is correct: The overall magnification of a compound microscope is approximately the product of the magnification of the objective and the magnification of the eyepiece. The magnification provided by the objective is related to the distance between the objective and the intermediate image (which is determined by the microscope's tube length) and the focal length of the objective. Thus, the length of the microscope tube affects the magnification. Statement 4 is incorrect: As mentioned in statement 1, the eyepiece acts as a magnifying glass, which is achieved using a convex lens or a combination of lenses that function as a convex lens.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:22:53+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-of-the-following-statements-about-optical-microscope-is-are-corr\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/","name":"Which of the following statements about optical microscope is\/are corr","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:22:53+00:00","dateModified":"2025-06-01T10:22:53+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A) 1 and 3. Statement 1 is correct: In a standard compound optical microscope, both the objective lens (or lens system) and the eyepiece lens (or lens system) act as convex lenses to produce magnification. The objective creates a magnified real intermediate image, and the eyepiece magnifies this intermediate image to form a virtual final image. Statement 2 is incorrect: The magnification of the objective lens is inversely proportional to its focal length. A shorter focal length objective provides higher magnification (and typically lower depth of field and working distance). Statement 3 is correct: The overall magnification of a compound microscope is approximately the product of the magnification of the objective and the magnification of the eyepiece. The magnification provided by the objective is related to the distance between the objective and the intermediate image (which is determined by the microscope's tube length) and the focal length of the objective. Thus, the length of the microscope tube affects the magnification. Statement 4 is incorrect: As mentioned in statement 1, the eyepiece acts as a magnifying glass, which is achieved using a convex lens or a combination of lenses that function as a convex lens.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-optical-microscope-is-are-corr\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"Which of the following statements about optical microscope is\/are corr"}]},{"@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\/90206","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=90206"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90206\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=90206"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=90206"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=90206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}