I'm having problems with the following problem:(adsbygoogle = window.adsbygoogle || []).push({});

A person who has a near point of 25.0 cm is looking with unaided eyes at an object that is located at the near point. The object has an angular size of 0.012 rad. Then, holding a magnifying glass (f= 10.0 cm) next to her eye, she views the image of this object , the image being located at the near point. What is the angular size of the image?

The answer is suppose to be 0.042 rad. However I'm getting a different answer. I used the formula M = (1/f - 1/d_{i})N

I assumed that N = 25.0 cm

d_{o}= 25.0cm

M = 0.012 rad

For the first part and in the second part

f= 10.0 cm

d_{i}= -25.0cm

However when I plug in my numbers I get an answer of 3.5. What am I doing wrong?

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# Homework Help: Angular Magnification and the Magnifying Glass

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