Question
A jeweler whose near point is $72 \mathrm{cm}$ from his eye uses a magnifying glass as in Figure $26.39 b$ to examine a watch. The watch is held $4.0 \mathrm{cm}$ from the magnifying glass. Find the angular magnification of the magnifying glass.
Step 1
First, we need to find the focal length of the magnifying glass. We know that the watch is held 4.0 cm from the magnifying glass, and the image is formed at the near point of the jeweler's eye, which is 72 cm away. We can use the lens formula to find the focal Show more…
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A jeweler whose near point is $72 \mathrm{~cm}$ from his eye uses a magni fying glass as in Figure $26-40 b$ to examine a watch. The watch is held $4.0\mathrm{~cm}$ from the magnifying glass. Find the angular magnification of the magnifying glass.
A jeweler whose near point is 72 cm from his eye uses a magnifying glass as in Figure 26.39b to examine a watch. The watch is held 4.0 cm from the magnifying glass. Find the angular magnification of the magnifying glass.
A jeweler examines a diamond with a magnifying glass. If the near-point distance of the jeweler is 20.6 cm, and the focal length of the magnifying glass is 7.62 cm, calculate the angular magnification when the diamond is held at the focal point of the magnifier. Assume the magnifying glass is directly in front of the jeweler's eyes.
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