A double-convex thin lens is made of glass with an index of refraction of 1.52. The radii of curvature of the faces of the lens are 60 cm and 72 cm. What is the focal length of the lens?
A) 70 cm
B) 63 cm
C) 75 cm
D) 66 cm
E) 58 cm
B
Physics & Space Science
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A nearsighted person cannot see objects clearly beyond 50 cm (the far point). If the patient has no astigmatism and contact lenses are prescribed, what is the power of the lens required to correct the patient's vision?
a. -2.0 diopters c. -4.0 diopters b. -3.3 diopters d. -5.0 diopters
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