{"id":133443,"date":"2023-03-04T22:29:44","date_gmt":"2023-03-04T16:59:44","guid":{"rendered":"https:\/\/www.mapsofindia.com\/my-india\/?p=133443"},"modified":"2023-03-04T22:29:44","modified_gmt":"2023-03-04T16:59:44","slug":"an-object-is-kept-at-a-distance-of-1m-from-a-lens-of-power-2d","status":"publish","type":"post","link":"https:\/\/www.mapsofindia.com\/my-india\/quiz\/an-object-is-kept-at-a-distance-of-1m-from-a-lens-of-power-2d","title":{"rendered":"An object is kept at a distance of 1m from a lens of power +2D:"},"content":{"rendered":"

Question :An object is kept at a distance of 1m from a lens of power +2D:<\/p>\n

(i) Identify the type of lens.
\n(ii) Calculate the focal length and distance of the image formed.<\/h2>\n

The correct answer is -(i) The given lens is a convex lens or a converging lens because its power is positive (+2D). (ii) The formula for calculating the focal length of a lens is:<\/h3>\n

1\/f = 1\/v – 1\/u<\/h3>\n

Where f is the focal length, u is the object distance, and v is the image distance. We know that u = 1m and the power of the lens is +2D. The formula for power is:<\/h3>\n

P = 1\/f<\/h3>\n

Therefore, f = 1\/P = 1\/2 = 0.5m.<\/h3>\n

Now, we can use the lens formula to calculate the image distance as:<\/h3>\n

1\/f = 1\/v – 1\/u<\/h3>\n

1\/0.5 = 1\/v – 1\/1<\/h3>\n

v = 0.67m<\/h3>\n

Therefore, the focal length of the lens is 0.5m and the image is formed at a distance of 0.67m from the lens.<\/h3>\n","protected":false},"excerpt":{"rendered":"

Question :An object is kept at a distance of 1m from a lens of power +2D: (i) Identify the type of lens. (ii) Calculate the focal length and distance of the image formed. The correct answer is -(i) The given lens is a convex lens or a converging lens because its power is positive (+2D). […]<\/p>\n","protected":false},"author":21830,"featured_media":132233,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12119],"tags":[],"class_list":{"0":"post-133443","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-quiz"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts\/133443","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/users\/21830"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/comments?post=133443"}],"version-history":[{"count":2,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts\/133443\/revisions"}],"predecessor-version":[{"id":133445,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts\/133443\/revisions\/133445"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/media\/132233"}],"wp:attachment":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/media?parent=133443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/categories?post=133443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/tags?post=133443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}