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an object of height 2 cm is held at a distance of 40cm in front of a concave lens of power -5d find the size of the image |
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Answer» we PUT lens FORMULA and get v=-5.71... then m=hi/HO m=-5.71/40 then m=hi/ho=v/u hi/2=-5.71/40 40hi=-11.42 hi= -0.2855 size of images is-0.2855 hi is LESS than ho |
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