{"id":90703,"date":"2025-06-01T10:34:05","date_gmt":"2025-06-01T10:34:05","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90703"},"modified":"2025-06-01T10:34:05","modified_gmt":"2025-06-01T10:34:05","slug":"which-one-of-the-following-materials-cannot-be-used-to-make-a-convex","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-materials-cannot-be-used-to-make-a-convex\/","title":{"rendered":"Which one of the following materials *cannot* be used to make a convex"},"content":{"rendered":"

Which one of the following materials *cannot* be used to make a convex lens?<\/p>\n

[amp_mcq option1=”Aluminium” option2=”Glass” option3=”Sapphire” option4=”Water” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is A, Aluminium.
\n<\/section>\n
\nA lens works by refracting (bending) light as it passes through the material. For a material to be used to make a lens, it must be transparent or at least translucent to the type of light intended to be used (e.g., visible light for optical lenses).
\nGlass, Sapphire, and Water are all transparent or translucent materials that can refract light, making them suitable for manufacturing lenses.
\nAluminium is a metal that is opaque to visible light. Light does not pass through it but is reflected or absorbed. Therefore, Aluminium cannot be used to make a convex lens for visible light.
\n<\/section>\n
\nLenses are typically made from materials like glass, plastic, quartz, sapphire, fluorite, or even liquids like water. The choice of material depends on the desired optical properties (like refractive index, dispersion), cost, durability, and the specific wavelength range of light for which the lens is intended.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following materials *cannot* be used to make a convex lens? [amp_mcq option1=”Aluminium” option2=”Glass” option3=”Sapphire” option4=”Water” correct=”option1″] This question was previously asked in UPSC CAPF – 2022 Download PDFAttempt Online The correct answer is A, Aluminium. A lens works by refracting (bending) light as it passes through the material. For a material … <\/p>\n

Detailed SolutionWhich one of the following materials *cannot* be used to make a convex<\/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":[1108,1153,1128],"class_list":["post-90703","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1108","tag-optics","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following materials *cannot* be used to make a convex<\/title>\n<meta name=\"description\" content=\"The correct answer is A, Aluminium. A lens works by refracting (bending) light as it passes through the material. For a material to be used to make a lens, it must be transparent or at least translucent to the type of light intended to be used (e.g., visible light for optical lenses). Glass, Sapphire, and Water are all transparent or translucent materials that can refract light, making them suitable for manufacturing lenses. Aluminium is a metal that is opaque to visible light. Light does not pass through it but is reflected or absorbed. Therefore, Aluminium cannot be used to make a convex lens for visible light.\" \/>\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-materials-cannot-be-used-to-make-a-convex\/\" \/>\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 materials *cannot* be used to make a convex\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A, Aluminium. A lens works by refracting (bending) light as it passes through the material. For a material to be used to make a lens, it must be transparent or at least translucent to the type of light intended to be used (e.g., visible light for optical lenses). Glass, Sapphire, and Water are all transparent or translucent materials that can refract light, making them suitable for manufacturing lenses. Aluminium is a metal that is opaque to visible light. Light does not pass through it but is reflected or absorbed. Therefore, Aluminium cannot be used to make a convex lens for visible light.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-materials-cannot-be-used-to-make-a-convex\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:34:05+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":"Which one of the following materials *cannot* be used to make a convex","description":"The correct answer is A, Aluminium. A lens works by refracting (bending) light as it passes through the material. For a material to be used to make a lens, it must be transparent or at least translucent to the type of light intended to be used (e.g., visible light for optical lenses). Glass, Sapphire, and Water are all transparent or translucent materials that can refract light, making them suitable for manufacturing lenses. Aluminium is a metal that is opaque to visible light. Light does not pass through it but is reflected or absorbed. Therefore, Aluminium cannot be used to make a convex lens for visible light.","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-materials-cannot-be-used-to-make-a-convex\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following materials *cannot* be used to make a convex","og_description":"The correct answer is A, Aluminium. A lens works by refracting (bending) light as it passes through the material. For a material to be used to make a lens, it must be transparent or at least translucent to the type of light intended to be used (e.g., visible light for optical lenses). Glass, Sapphire, and Water are all transparent or translucent materials that can refract light, making them suitable for manufacturing lenses. Aluminium is a metal that is opaque to visible light. Light does not pass through it but is reflected or absorbed. Therefore, Aluminium cannot be used to make a convex lens for visible light.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-materials-cannot-be-used-to-make-a-convex\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:34:05+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\/which-one-of-the-following-materials-cannot-be-used-to-make-a-convex\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-materials-cannot-be-used-to-make-a-convex\/","name":"Which one of the following materials *cannot* be used to make a convex","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:34:05+00:00","dateModified":"2025-06-01T10:34:05+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A, Aluminium. A lens works by refracting (bending) light as it passes through the material. For a material to be used to make a lens, it must be transparent or at least translucent to the type of light intended to be used (e.g., visible light for optical lenses). Glass, Sapphire, and Water are all transparent or translucent materials that can refract light, making them suitable for manufacturing lenses. Aluminium is a metal that is opaque to visible light. Light does not pass through it but is reflected or absorbed. 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