An object has an angular size of 0.0140 rad when placed at the near point (20.0 cm) of an eye. When the eye views this object using a magnifying glass, the largest possible angular size of the image is 0.0490 rad. What is the focal length of the magnifying glass?
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Don't be at that craic now Orla, you just need to Trappe yourself in the library a bit more often
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