Question
Your friend has a near point of $138 \mathrm{cm},$ and she wears contact lenses that have a focal length of $35.1 \mathrm{cm} .$ How close can she hold a magazine and still read it clearly?
Step 1
First, we need to find the power of the contact lenses. The power of a lens is given by the formula P = 1/f, where f is the focal length of the lens. In this case, the focal length of the contact lenses is 35.1 cm. Show more…
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