Lesson on Linear magnification.
Answer Text: Linear magnification.The linear magnification produced by a lens defined as the ratio of the height of the image to the height of the object, denoted by letter ‘m’, therefore;m = height of the image /height of the object. Magnification is also given by = distance of the image from the lens/ dist. of object from lens.m =#v/u#ExampleAn object 0.05 m high is placed 0.15 m in front of a convex lens of focal length 0.1 m. Find by construction, the position, nature and size ofthe image. What is the magnification?SolutionLet 1 cm represent 5 cm.hence 0.05 m = 5 cm = 1 cm –object height0.15 m = 15 cm = 3 cm0.1 m = 10 cm = 2 cm – focal length.a) Image formed is beyond 2 F- Inverted- Real- Magnifiedb) magnification=#v/u#=#frac{30cm}{15cm}#=2