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# A cylindrical glass rod has its two coaxial ends of spherical from bulging outward. The front and has a radius of curvature 5 cm and the back end which is silvered has a radius of curvature 8 cm. The thickness of the rod along the axis is 10 cm. Calculate the position of the image of a point at the axis 50 cm from front face (ang=1.5)

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