An object is placed 60cm away from the screen, if a convex lens is placed in between at two different positions, then real images are formed on the screen two times if rhe height of the image are 9cm and 4 cm, then find the height of the object and focal lenghts of the lenses?
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When an object is placed at a distance of 60cm from the convex mirror the magnification produced is 0.5.
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