Question
You're looking into a glass cylinder with refractive index $1.55$. A spot of dust on the far side appears to be $18.2 \mathrm{~cm}$ from the front edge. What's the cylinder's actual diameter?
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We know that the refractive index (n) of the glass cylinder is 1.55. Show more…
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You sight along the rim of a glass with vertical sides so that the top rim is lined up with the opposite edge of the bottom ($\textbf{Fig. P33.45a}$). The glass is a thin-walled, hollow cylinder 16.0 cm high. The diameter of the top and bottom of the glass is 8.0 cm. While you keep your eye in the same position, a friend fills the glass with a transparent liquid, and you then see a dime that is lying at the center of the bottom of the glass (Fig. P33.45b). What is the index of refraction of the liquid?
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