{"id":3941,"date":"2023-01-09T10:51:38","date_gmt":"2023-01-09T10:51:38","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3941"},"modified":"2024-11-22T06:27:17","modified_gmt":"2024-11-22T06:27:17","slug":"s-15-e-images-formed-by-lenses","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-15-e-images-formed-by-lenses\/","title":{"rendered":"S-15.e Images Formed By Lenses"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\">Images Formed By Lenses<\/h2>\n\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\">Key Notes :<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"833\" height=\"575\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/09\/image-32.png\" alt=\"\" class=\"wp-image-9459\" style=\"aspect-ratio:1.448695652173913;width:664px;height:auto\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/09\/image-32.png 833w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/09\/image-32-300x207.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/09\/image-32-768x530.png 768w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><\/figure><\/div>\n\n\n<p class=\"has-large-font-size\"><strong>Introduction to Lenses:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Lenses are transparent curved pieces of glass or plastic that can bend light rays.<\/li>\n\n\n\n<li>There are two main types of lenses: convex and concave.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Convex Lenses:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Convex lenses are thicker in the middle and thinner at the edges.<\/li>\n\n\n\n<li>They are also called converging lenses because they converge (bring together) light rays.<\/li>\n\n\n\n<li>Convex lenses can form real or virtual images depending on the object&#8217;s position relative to the lens.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Concave Lenses:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Concave lenses are thinner in the middle and thicker at the edges.<\/li>\n\n\n\n<li>They are also called diverging lenses because they diverge (spread out) light rays.<\/li>\n\n\n\n<li>Concave lenses always form virtual images.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Image Formation with Convex Lenses:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Convex lenses can form two types of images: real and virtual.<\/li>\n\n\n\n<li>Real images are formed when light rays actually converge to a point on the opposite side of the lens.<\/li>\n\n\n\n<li>Virtual images are formed when extended light rays appear to converge on the same side as the object.<\/li>\n\n\n\n<li>The position and size of the image depend on the object&#8217;s distance from the lens.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Image Characteristics:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Images can be:\n<ul class=\"wp-block-list\">\n<li>Real and inverted (upside down).<\/li>\n\n\n\n<li>Real and upright.<\/li>\n\n\n\n<li>Virtual and upright.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>The size of the image can be:\n<ul class=\"wp-block-list\">\n<li>Larger than the object.<\/li>\n\n\n\n<li>Smaller than the object.<\/li>\n\n\n\n<li>The same size as the object.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Lens Equation:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The lens equation relates the object distance (do), image distance (di), and focal length (f) of the lens:\n<ul class=\"wp-block-list\">\n<li>1\/f = 1\/do + 1\/di<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Focal Length:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The focal length is the distance between the lens and the point where parallel rays of light converge (or appear to converge) after passing through the lens.<\/li>\n\n\n\n<li>Convex lenses have positive focal lengths, while concave lenses have negative focal lengths.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Examples of Lens Applications:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Convex lenses are used in eyeglasses to correct farsightedness or nearsightedness.<\/li>\n\n\n\n<li>Cameras and telescopes use convex lenses to form images.<\/li>\n\n\n\n<li>Concave lenses are used in glasses to correct double vision (diplopia).<\/li>\n<\/ul>\n\n\n\n<p class=\"has-large-font-size\"><strong>Summary:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Lenses are transparent curved objects that can bend light rays.<\/li>\n\n\n\n<li>Convex lenses converge light and can form real or virtual images.<\/li>\n\n\n\n<li>Concave lenses diverge light and always form virtual images.<\/li>\n\n\n\n<li>The type, size, and position of the image depend on the object&#8217;s distance from the lens.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/82461\/882\/952\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-70.png\" alt=\"\" class=\"wp-image-6056\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-70.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-70-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-70-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-70-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/81734\/123\/444\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-65.png\" alt=\"\" class=\"wp-image-6057\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-65.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-65-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-65-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-65-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Images Formed By Lenses Key Notes : Introduction to Lenses: Convex Lenses: Concave Lenses: Image Formation with Convex Lenses: Image Characteristics: Lens Equation: Focal Length: Examples of Lens Applications: Summary: Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"footnotes":""},"class_list":["post-3941","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3941"}],"version-history":[{"count":11,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3941\/revisions"}],"predecessor-version":[{"id":15059,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3941\/revisions\/15059"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}