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A physics professor hands you a box that contains the following material: (mounted) lens A with $f_A = 10$ cm, lens B with $f_B = 1$ cm, lens C with $f_C = 5$ mm and lens D with $f_D = -2$ mm. There is also a piece of tubing 15 cm long that fits the lens mounts exactly and can be cut to any length you like with the enclosed hacksaw, a focus gear (that can be used to move the objective lens mount small distances along its axis in the tube), glue, screws, a slide/tube mounting bracket, and things like that.

Create a rough design in the space above for a simple microscope with a magnification of $M = -500$ using this material and equipment. Clearly indicate the lenses you use and their arrangement in the tube.


Robert G. Brown 2003-02-09