Question
A jeweler whose near point is $72 \mathrm{~cm}$ from his eye uses a magni fying glass as in Figure $26-40 b$ to examine a watch. The watch is held $4.0\mathrm{~cm}$ from the magnifying glass. Find the angular magnification of the magnifying glass.
Step 1
Step 1: We know that the angular magnification (M) of the magnifying glass is given by the formula: \[ M = \frac{1}{f} - \frac{1}{D_i} \] where \(f\) is the focal length of the lens and \(D_i\) is the image distance. Show more…
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