A Double-Convex Thin Glass Lens Has Equal-Magnitude Radii of Curvature $+ 37.3 \mathrm {~cm}$

A double-convex thin glass lens has equal-magnitude radii of curvature. The focal length of the Iens is $+ 37.3 \mathrm {~cm}$ and the index of refraction of the glass is $1.52$ . What is the magnitude of the radius of curvature of each convex surface?

A) $31 \mathrm {~cm}$
B) $46 \mathrm {~cm}$
C) $35 \mathrm {~cm}$
D) $43 \mathrm {~cm}$
E) $39 \mathrm {~cm}$

Correct Answer:

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