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**1. Homework Statement**

f = 10 cm

i = 25 cm

Find angular magnification of lens

**2. Homework Equations**

Ang mag = theta_image/theta_object

**3. The Attempt at a Solution**

I found p to be 16.67

using 1/p+1/25=1/10

and I am not sure about the next step.

theta_0 = atan (16.67/25)

theta_f = atan (25/25)

and found thetas, and divided them to get 0.785/0.588=1.335 as my final answer.