{"id":2339,"date":"2022-11-14T07:48:44","date_gmt":"2022-11-14T07:48:44","guid":{"rendered":"https:\/\/theexampillar.com\/ncert\/?p=2339"},"modified":"2022-11-29T06:41:19","modified_gmt":"2022-11-29T06:41:19","slug":"ncert-solutions-class-7-science-chapter-15-light","status":"publish","type":"post","link":"https:\/\/theexampillar.com\/ncert\/ncert-solutions-class-7-science-chapter-15-light\/","title":{"rendered":"NCERT Solutions Class 7 Science Chapter 15 Light"},"content":{"rendered":"

NCERT Solutions Class 7 Science\u00a0<\/span><\/h2>\n

The NCERT Solutions in English Language for Class 7 Science Chapter – 15 (Light) <\/strong>has been provided here to help the students in solving the questions from this exercise.<\/span><\/p>\n

Chapter – 15 (Light)<\/span><\/h2>\n

1. Fill in the blanks:
\n<\/strong><\/span>(a) An image that cannot be obtained on a screen is called ____________.
\n<\/span>(b) Image formed by a convex __________ is always virtual and smaller in size.
\n<\/span>(c) An image formed by a __________ mirror is always of the same size as that of the object.
\n<\/span>(d) An image which can be obtained on a screen is called a _________ image.
\n<\/span>(e) An image formed by a concave ___________ cannot be obtained on a screen.<\/span><\/span><\/p>\n

Answer –
\n<\/strong><\/span>(a) An image that cannot be obtained on a screen is called\u00a0virtual image<\/strong><\/span>.
\n<\/span>(b) Image formed by a convex\u00a0mirror<\/strong><\/span> is always virtual and smaller in size.
\n<\/span>(c) An image formed by a\u00a0plane<\/strong><\/span>\u00a0mirror is always of the same size as that of the object.
\n<\/span>(d) An image which can be obtained on a screen is called a\u00a0real<\/strong><\/span>\u00a0image.
\n<\/span>(e) An image formed by a concave\u00a0lens<\/strong><\/span>\u00a0cannot be obtained on a screen.<\/span><\/span><\/p>\n

2. Mark \u2018T\u2019 if the statement is true and \u2018F\u2019 if it is false:
\n<\/strong><\/span>(a) We can obtain an enlarged and erect image by a convex mirror. (T\/F)
\n<\/span>(b) A concave lens always form a virtual image. (T\/F)
\n<\/span>(c) We can obtain a real, enlarged and inverted image by a concave mirror. (T\/F)
\n<\/span>(d) A real image cannot be obtained on a screen. (T\/F)
\n<\/span>(e) A concave mirror always form a real image. (T\/F)<\/span><\/span><\/p>\n

Answer –
\n<\/strong><\/span>(a) We can obtain an enlarged and erect image by a convex mirror. (False)<\/strong>
\n<\/span>(b) A concave lens always form a virtual image. (True)<\/strong>
\n<\/span>(c) We can obtain a real, enlarged and inverted image by a concave mirror. (True)<\/strong>
\n<\/span>(d) A real image cannot be obtained on a screen. (False)<\/strong>
\n<\/span>(e) A concave mirror always form a real image. (False)<\/strong><\/span><\/span><\/p>\n

3. Match the items given in Column I with one or more items of Column II.<\/strong><\/span><\/p>\n

\n\n\n\n\n\n\n\n\n\n
Column – I<\/strong><\/span><\/td>\nColumn – II<\/strong><\/span><\/td>\n<\/tr>\n
(a<\/span>) A plane mirror<\/span><\/span><\/td>\n(<\/span>i) Used as a magnifying glass<\/span><\/span><\/td>\n<\/tr>\n
(b) A convex mirror<\/span><\/td>\n(ii) Can form image of objects spread over a large area.<\/span><\/td>\n<\/tr>\n
(c) A convex lens<\/span><\/td>\n(iii) Used by dentists to see enlarged image of teeth.<\/span><\/td>\n<\/tr>\n
(d) A concave mirror<\/span><\/td>\n(iv) The image is always inverted and magnified<\/span><\/td>\n<\/tr>\n
(e) A concave lens<\/span><\/td>\n(v) The image is erect and of the same size as the object.<\/span><\/td>\n<\/tr>\n
<\/td>\n(vi) The image is erect and smaller in size than the object.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Answer – <\/strong><\/span><\/p>\n

\n\n\n\n\n\n\n\n\n
Column – I<\/strong><\/span><\/td>\nColumn – II<\/strong><\/span><\/td>\n<\/tr>\n
(a) A plane mirror<\/span><\/td>\n(v) The image is erect and of the same size as the object.<\/span><\/td>\n<\/tr>\n
(b) A convex mirror<\/span><\/td>\n(ii) Can form an image of objects spread over a large area.<\/span><\/td>\n<\/tr>\n
(c) A convex lens<\/span><\/td>\n(i) Used as a magnifying glass<\/span><\/td>\n<\/tr>\n
(d) A concave mirror<\/span><\/td>\n(iii) Used by dentists to see an enlarged image of teeth.<\/span><\/td>\n<\/tr>\n
(e) A concave lens<\/span><\/td>\n(vi) The image is erect and smaller in size than the object.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

4. State the characteristics of the image formed by a plane mirror<\/strong><\/span><\/p>\n

Answer –\u00a0<\/strong><\/span>Characteristics of the image formed by a plane mirror are as follows:<\/span><\/span><\/p>\n