Created by StemPy LabA student looks at a stamp through a magnifying glass. She first holds the glass so that the image is at her near point, and then so that the image is at infinity. How do the two magnifying powers compare?
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← A retired teacher finds that the print of a book becomes sharp only when she holds it at least 45 cm from her eyes. Her optician fits a thin lens at the eye so that she can read at the usual distance of 25 cm. What is the power of that lens?A magnifying glass has a focal length of 6.8 cm. What is its magnifying power when the image is at the near point, 25 cm from the lens? →
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