{"id":133663,"date":"2022-03-03T23:40:20","date_gmt":"2022-03-03T18:10:20","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=133663"},"modified":"2024-10-07T15:24:21","modified_gmt":"2024-10-07T09:54:21","slug":"concave-mirror-focal-point","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/class-10\/physics\/light\/concave-mirror-focal-point\/","title":{"rendered":"Concave Mirror &#8211; Focal Point"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/class-10\/physics\/light\/concave-mirror-focal-point\/#What_are_spherical_mirrors\" title=\"What are spherical mirrors?\">What are spherical mirrors?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/class-10\/physics\/light\/concave-mirror-focal-point\/#What_are_the_Different_Types_of_Images_Formed_by_a_Concave_Mirror\" title=\"What are the Different Types of Images Formed by a Concave Mirror?\">What are the Different Types of Images Formed by a Concave Mirror?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/class-10\/physics\/light\/concave-mirror-focal-point\/#Rays_of_light_parallel_to_each_other_as_well_as_the_principal_axis\" title=\"Rays of light parallel to each other as well as the principal axis\">Rays of light parallel to each other as well as the principal axis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/class-10\/physics\/light\/concave-mirror-focal-point\/#Rays_of_light_parallel_to_each_other_but_not_parallel_to_the_principal_axis\" title=\"Rays of light parallel to each other but not parallel to the principal axis\">Rays of light parallel to each other but not parallel to the principal axis<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>Table of Contents<\/strong><\/p>\n<ul>\n<li>Spherical Mirrors<\/li>\n<li>Types of Images formed by a Concave Mirror\n<ul>\n<li>Rays of Light Parallel to Each other as well as the Principal Axis<\/li>\n<li>Rays of Light Parallel to Each other but not Parallel to the Principal Axis<\/li>\n<li>Rays of Light not Parallel to Each other and Passing through the Principal Focus<\/li>\n<\/ul>\n<\/li>\n<li>Summary<\/li>\n<li>What\u2019s Next?<\/li>\n<\/ul>\n<p>In the previous segment, we learnt about <strong>Spherical mirrors. <\/strong>In this segment, let us understand the focal point of a concave mirror.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_spherical_mirrors\"><\/span>What are spherical mirrors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Spherical mirrors are mirrors whose reflecting surface is a part of a sphere.<\/li>\n<li>The reflecting surface can be either curved inwards or curved outwards.<\/li>\n<li>The mirror whose reflecting surface is curved inwards is known as a <strong>Concave mirror.<\/strong><\/li>\n<li>The mirror whose reflecting surface is curved outwards is known as a <strong>Convex mirror.<\/strong><\/li>\n<li>For a concave mirror, the centre of curvature lies at the front of the reflecting surface.<\/li>\n<li>For a convex mirror, the centre of curvature lies behind the reflecting surface.<\/li>\n<li>The midpoint of the line segment joining the pole and the centre of curvature is known<\/li>\n<\/ul>\n<p>as the focal point. It is denoted by the point \u2018F\u2019.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-133661 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533045.jpg\" alt=\"\" width=\"369\" height=\"161\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533045.jpg?v=1646330534 369w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533045-300x131.jpg?v=1646330534 300w\" sizes=\"(max-width: 369px) 100vw, 369px\" \/><\/p>\n<p><strong>Focal point of a concave mirror<\/strong><\/p>\n<ul>\n<li>The focal point is also known as the <strong>Principal focus <\/strong>as it lies on the principal axis.<\/li>\n<li>All the rays of light parallel to each other as well as the principal axis of a concave mirror converge at the focal point.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-133660 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533048.jpg\" alt=\"\" width=\"584\" height=\"262\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533048.jpg?v=1646330534 584w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533048-300x135.jpg?v=1646330534 300w\" sizes=\"(max-width: 584px) 100vw, 584px\" \/><\/p>\n<p><strong>Rays of light parallel to each other and the principal axis<\/strong><\/p>\n<p>For example,<\/p>\n<p>The sun is at a very large distance away from the earth. So, even though the rays of light are radially emitted by the sun, these rays are considered parallel when they reach the earth. That is, when an object is placed at infinity, the rays of light emitted from it are parallel to each other. The parallel rays of light follow the laws of reflection due to which the reflected light converges at the principal focus. Thus, the image of the sun is formed at the principal focus. If this image is focused on a paper, the temperature of the paper at that point will increase resulting in the burning of paper at that point.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Different_Types_of_Images_Formed_by_a_Concave_Mirror\"><\/span>What are the Different Types of Images Formed by a Concave Mirror?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The images formed by a concave mirror depend upon the light emitted from the object and how the rays of light are incident on the concave mirror. The different types of images formed by a concave mirror are as follows:<\/p>\n<p><strong>Also Check:<\/strong><\/p>\n<p><a href=\"https:\/\/infinitylearn.com\/surge\/topics\/uses-of-concave-and-convex-mirrors\/\"><strong>Uses of a Convex Mirror<\/strong><\/a><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Rays_of_light_parallel_to_each_other_as_well_as_the_principal_axis\"><\/span>Rays of light parallel to each other as well as the principal axis<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When an object is at infinity, the rays of light emerging from it are parallel to each other. Sometimes these rays are parallel even when the object is not at infinity. When these parallel rays of light are parallel to the principal axis as well, the reflected rays of light converge at the principal focus.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-133662 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533050.jpg\" alt=\"\" width=\"647\" height=\"217\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533050.jpg?v=1646330534 647w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533050-300x101.jpg?v=1646330534 300w\" sizes=\"(max-width: 647px) 100vw, 647px\" \/><\/p>\n<p><strong>Reflection of parallel rays of light parallel to the principal axis<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Rays_of_light_parallel_to_each_other_but_not_parallel_to_the_principal_axis\"><\/span>Rays of light parallel to each other but not parallel to the principal axis<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>When the rays of light emitted from an object are parallel to each other but not parallel to the principal axis, then the light after reflection, converges at a point that is not on the principal axis. This point of convergence is known as the <strong>Focus<\/strong>.<\/p>\n<p><img loading=\"lazy\" class=\"aligncenter wp-image-133659 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533055.jpg\" alt=\"\" width=\"572\" height=\"278\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533055.jpg?v=1646330534 572w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2022\/03\/img-1646330533055-300x146.jpg?v=1646330534 300w\" sizes=\"(max-width: 572px) 100vw, 572px\" \/><\/p>\n<p><strong>Reflection of parallel rays of light not parallel to the principal axis<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents Spherical Mirrors Types of Images formed by a Concave Mirror Rays of Light Parallel to Each other [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Concave Mirror - Focal Point","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Concave Mirror - Focal Point | Class 10 Physics Light","custom_permalink":"class-10\/physics\/light\/concave-mirror-focal-point\/"},"categories":[8592,8591],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Concave Mirror - Focal Point - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"Concave Mirror - Focal Point | Class 10 Physics 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:\/\/infinitylearn.com\/surge\/class-10\/physics\/light\/concave-mirror-focal-point\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Concave Mirror - Focal Point - Infinity Learn by Sri Chaitanya\" \/>\n<meta property=\"og:description\" content=\"Concave Mirror - 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