1. The problem statement, all variables and given/known data An anatomist is viewing heart muscle cells with a microscope that has two selectable objectives with refracting powers of 140 and 270 diopters. When she uses the 140-diopter objective, the image of a cell subtends an angle of 3.7 x 10-3 rad with the eye. What angle is subtended when she uses the 270-diopter objective? 2. Relevant equations tan alpha=h/f 3. The attempt at a solution h=tan(3.7x10^-3)(140) = 0.518 tan beta = 0.518/270 beta = 0.0019185 rad This is incorrect... I am not sure if I'm even going about this problem the right way. Thanks for any help you can give!!