{"id":129330,"date":"2021-02-18T08:53:07","date_gmt":"2021-02-18T08:53:07","guid":{"rendered":"https:\/\/www.indcareer.com\/schools\/?p=129330"},"modified":"2023-09-15T08:23:11","modified_gmt":"2023-09-15T08:23:11","slug":"ncert-solutions-for-7th-class-science-chapter-15-light","status":"publish","type":"post","link":"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-15-light\/","title":{"rendered":"NCERT Solutions for 7th Class Science: Chapter 15-Light"},"content":{"rendered":"\n<p>Class 7: Science Chapter 15 solutions. Complete Class 7 Science Chapter 15 Notes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ncert-solutions-for-7th-class-science-chapter-15-light\"><strong>NCERT Solutions for 7th Class Science: Chapter 15-Light<\/strong><\/h2>\n\n\n\n<p>NCERT 7th Science Chapter 15, class 7 Science Chapter 15 solutions<\/p>\n\n\n\n<p>Page No: 189<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-exercises\">Exercises<\/h2>\n\n\n\n<p><strong>1. Fill in the blanks:<br>(a) An image that cannot be obtained on a screen is called ____________.<br>(b) Image formed by a convex __________ is always virtual and smaller in size.<br>(c) An image formed by a __________ mirror is always of the same size as that of the object.<br>(d) An image which can be obtained on a screen is called a _________ image.<br>(e) An image formed by a concave ___________ cannot be obtained on a screen.<\/strong><\/p>\n\n\n\n<p><br><strong>Answer<\/strong><\/p>\n\n\n\n<p>(a) An image that cannot be obtained on a screen is called virtual image.<\/p>\n\n\n\n<p>(b) Image formed by a convex mirror is always virtual and smaller in size.<\/p>\n\n\n\n<p>(c) An image formed by a plane mirror is always of the same size as that of the object.<\/p>\n\n\n\n<p>(d) An image which can be obtained on a screen is called a real image.<\/p>\n\n\n\n<p>(e) An image formed by a concave lens cannot be obtained on a screen.<\/p>\n\n\n\n<p><strong>2. Mark T if the statement is true and F if it is false:<br>(a) We can obtain an enlarged and erect image by a convex mirror. (T\/F)<br>(b) A concave lens always form a virtual image. (T\/F)<br>(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T\/F)<br>(d) A real image cannot be obtained on a screen. (T\/F)<br>(e) A concave mirror always form a real image. (T\/F)<\/strong><\/p>\n\n\n\n<p><br><strong>Answer<\/strong><\/p>\n\n\n\n<p>(a) F<br>(b) T<br>(c) T<br>(d) F<br>(e) F<\/p>\n\n\n\n<p><strong>3. Match the items given in Column I with one or more items of Column II.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Column I<\/strong><\/td><td><strong>Column II<\/strong><\/td><\/tr><tr><td><strong>(a) A plane mirror<\/strong><\/td><td><strong>(i) Used as a magnifying glass.<\/strong><\/td><\/tr><tr><td><strong>(b) A convex mirror<\/strong><\/td><td><strong>(ii) Can form image of objects spread over a large area.<\/strong><\/td><\/tr><tr><td><strong>(c) A convex lens<\/strong><\/td><td><strong>(iii) Used by dentists to see enlarged image of teeth.<\/strong><\/td><\/tr><tr><td><strong>(d) A concave mirror<\/strong><\/td><td><strong>(iv) The image is always inverted and magnified.<\/strong><\/td><\/tr><tr><td><strong>(e) A concave lens<\/strong><\/td><td><strong>(v) The image is erect and of the same size as the object.<\/strong><\/td><\/tr><tr><td><strong>&#8211;<\/strong><\/td><td><strong>(vi) The image is erect and smaller in size than the object.<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Column I<\/strong><\/td><td><strong>Column II<\/strong><\/td><\/tr><tr><td>(a) A plane mirror<\/td><td>(v) The image is erect and of the same size as the object.<\/td><\/tr><tr><td>(b) A convex mirror<\/td><td>(ii) Can form image of objects spread over a large area.<\/td><\/tr><tr><td>(c) A convex lens<\/td><td>(i) Used as a magnifying glass.<\/td><\/tr><tr><td>(d) A concave mirror<\/td><td>(iii) Used by dentists to see enlarged image of teeth.<\/td><\/tr><tr><td>(e) A concave lens<\/td><td>(vi) The image is erect and smaller in size than the object.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>4. State the characteristics of the image formed by a plane mirror.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>Characteristics of the image formed by a plane mirror:<br>(i) The image formed is virtual<br>(ii) The image is laterally inverted.<br>(iii) It is of the same size as the object.<br>(iv) The image is situated at the same distance from the mirror as the object.<br>(v) The image is erected.<\/p>\n\n\n\n<p><strong>5. Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>A, H, I, M, O, T, U, V, W, X, Y are the letters of English alphabet in which the image formed in a plane mirror appears exactly like the letter itself.<br>Discuss with your classmates to find the same types of words from other languages.<\/p>\n\n\n\n<p>Page No: 190<\/p>\n\n\n\n<p><strong>6. What is a virtual image? Give one situation where a virtual image is formed.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>The image which cannot be formed or obtained on the screen is called virtual image.<br>When we stand in front of our dressing table mirror, we use to see our virtual image. The virtual image is formed in case of plane and convex mirror.<\/p>\n\n\n\n<p><strong>7. State two differences between a convex and a concave lens.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Convex lens<\/strong><\/td><td><strong>Concave lens<\/strong><\/td><\/tr><tr><td>(i) Convex lens converges the light falling on it.<\/td><td>(i) Concave lens diverges the light falling on it.<\/td><\/tr><tr><td>(ii) Convex lens is thicker in the middle.<\/td><td>(ii) Concave lens is thinner in the middle.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>8. Give one use each of a concave and a convex mirror.<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>Concave mirror forms large images therefore it is used by dentists to see enlarged image of teeth.<br>Convex mirror forms diminished image therefore it used as rear view mirror in vehicles.<\/p>\n\n\n\n<p><strong>9. Which type of mirror can form a real image?<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>Concave mirror can form a real image.<\/p>\n\n\n\n<p><strong>10. Which type of lens forms always a virtual image?<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>Concave lens forms always a virtual image.<\/p>\n\n\n\n<p>Choose the correct option in questions 11\u201313<\/p>\n\n\n\n<p>NCERT 7th Science Chapter 15, class 7 Science Chapter 15 solutions<br><br><strong>11. A virtual image larger than the object can be produced by a<br>(i) concave lens<br>(ii) concave mirror<br>(iii) convex mirror&nbsp;<br>(iv) plane mirror<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>(ii) concave mirror can produce a virtual image larger than the object.<\/p>\n\n\n\n<p><strong>12. David is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, then the distance between David and his image will be<br>(i) 3 m&nbsp;<br>(ii) 5 m<br>(iii) 6 m<br>(iv) 8 m<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>(iii) 6 m<br>In case of plane mirror, the image is situated at the same distance from the mirror as the object.<br>Initial distance between David and the mirror = 4 m<br>Final distance between David and the mirror = 4-1 = 3 m<br>Therefore, distance between David and his image = 3+3 = 6m<\/p>\n\n\n\n<p><strong>13. The rear view mirror of a car is a plane mirror. A driver is reversing his car at a speed of 2 m\/s. The driver sees in his rear view mirror the image of a truck parked behind his car. The speed at which the image of the truck appears to approach the driver will be<br>(i) 1 m\/s&nbsp;<br>(ii) 2 m\/s<br>(iii) 4 m\/s&nbsp;<br>(iv) 8 m\/s<\/strong><\/p>\n\n\n\n<p><strong>Answer<\/strong><\/p>\n\n\n\n<p>(iii) 4 m\/s<br>In case of plane mirror, the distance is always doubled therefore the speed is in case between the image and the object. So, when driver is reversing his car at a speed of 2 m\/s, then the image is also coming closer to the mirror by 2m\/s. Thus, it seems that the image of the truck appears to approach the driver at 4 m\/s.<\/p>\n\n\n\n<p>NCERT 7th Science Chapter 15, class 7 Science Chapter 15 solutions<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-ncert-solutions-for-7th-class-science-chapter-15-nbsp-download-pdf\">NCERT Solutions for 7th Class Science: Chapter 15:&nbsp;<strong>Download PDF<\/strong><\/h2>\n\n\n\n<p>NCERT Solutions for 7th Class Science: Chapter 15-Light<\/p>\n\n\n\n<p><a href=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/09\/NCERT-Solutions-for-7th-Class-Science_-Chapter-15-Light.pdf\"><strong>Download PDF<\/strong>: NCERT Solutions for 7th Class Science: Chapter 15-Light PDF<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-chapter-wise-ncert-solutions-class-7-science\">Chapter-wise NCERT Solutions Class 7 Science<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-1-nutrition-in-plants\/\">Chapter 1 Nutrition in Plants<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-2-nutrition-in-animals\/\">Chapter 2 Nutrition in Animals<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-3-fibre-to-fabric\/\">Chapter 3 Fibre to Fabric<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-4-heat\/\">Chapter 4 Heat<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-5-acids-bases-and-salts\/\">Chapter 5 Acids, Bases and Salts<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-6-physical-and-chemical-changes\/\">Chapter 6 Physical and Chemical Changes<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-7-weather-climate-and-adaptations-of-animals-to-climate\/\">Chapter 7 Weather, Climate and Adaptations of Animals to Climate<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-8-winds-storms-and-cyclones\/\">Chapter 8 Winds, Storms and Cyclones<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-9-soil\/\">Chapter 9 Soil<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-10-respiration-in-organisms\/\">Chapter 10 Respiration in Organisms<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-11-transportation-in-animals-and-plants\/\">Chapter 11 Transportation in Animals and Plants<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-12-reproduction-in-plants\/\">Chapter 12 Reproduction in Plants<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-13-motion-and-time\/\">Chapter 13 Motion and Time<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-14-electric-current-and-its-effect\/\">Chapter 14 Electric Current and Its Effects<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/cert-solutions-for-7th-class-science-chapter-15-light\/\">Chapter 15 Light<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-16-water-a-precious-resource\/\">Chapter 16 Water: A Precious Resource<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-17-forests-our-lifeline\/\">Chapter 17 Forests: Our Lifeline<\/a><\/td><\/tr><tr><td><a href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-18-watsewater-story\/\">Chapter 18 Wastewater Story<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-about-ncert\"><strong><br><\/strong>About NCERT<\/h2>\n\n\n\n<p>The National Council of Educational Research and Training is an autonomous organization of the Government of India which was established in 1961 as a literary, scientific, and charitable Society under the Societies Registration Act. Its headquarters are located at Sri Aurbindo Marg in New Delhi. <a href=\"https:\/\/ncert.nic.in\/\" target=\"_blank\" rel=\"noreferrer noopener\">Visit the Official NCERT website<\/a> to learn more. <\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions\/\">NCERT Solutions<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-class-vii\/\">NCERT Solutions for Class 7<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-primary-background-color has-background wp-element-button\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-class-7-science\/\">NCERT Solutions for Class 7 Science<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Class 7: Science Chapter 15 solutions. Complete Class 7 Science Chapter 15 Notes. NCERT Solutions for 7th Class Science: Chapter 15-Light NCERT 7th Science Chapter 15, class 7 Science Chapter 15 solutions Page No: 189 Exercises 1. Fill in the blanks:(a) An image that cannot be obtained on a screen is called ____________.(b) Image formed [&hellip;]<\/p>\n","protected":false},"author":302,"featured_media":627366,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"newspack_featured_image_position":"","newspack_post_subtitle":"","newspack_article_summary_title":"Overview:","newspack_article_summary":"","newspack_hide_updated_date":false,"newspack_show_updated_date":false,"footnotes":""},"categories":[1411,907],"tags":[1542],"boards":[1180],"class_list":["post-129330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-book-solutions","category-class-7","tag-ncert-science-class-7","boards-ncert","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.0 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>NCERT Solutions Class 7, Science Chapter 15- IndCareer Schools<\/title>\n<meta name=\"description\" content=\"NCERT Solutions for 7th Class Science: Chapter 15-Light | Browse all Class 7 Science Solutions of NCERT books- IndCareer Schools\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-15-light\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NCERT Solutions for 7th Class Science: Chapter 15-Light\" \/>\n<meta property=\"og:description\" content=\"Class 7: Science Chapter 15 solutions. 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NCERT Solutions for 7th Class Science: Chapter 15-Light NCERT 7th\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.indcareer.com\/schools\/ncert-solutions-for-7th-class-science-chapter-15-light\/\" \/>\n<meta property=\"og:site_name\" content=\"IndCareer Schools\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/indcareer\" \/>\n<meta property=\"article:published_time\" content=\"2021-02-18T08:53:07+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-09-15T08:23:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.indcareer.com\/schools\/wp-content\/uploads\/2021\/02\/NCERT-Solutions-1-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1600\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Pooja\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta 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