Answer
-8.41 cm
Work Step by Step
Use the lensmaker’s equation, 23-10.
$$\frac{1}{f}=P=(n-1)(\frac{1}{R_1}+\frac{1}{R_2})$$
$$R_2=\frac{(n-1)R_1}{PR_1-(n-1)}$$
$$R_2=\frac{(1.62-1)(0.16m)}{(-3.5D)(0.16m)-(1.62-1)}$$
$$=-0.0841m$$
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