A plastic convex meniscus Fig 23 14 contact lens is made
A plastic convex meniscus (Fig. 23.14) contact lens is made of plastic with an index of refraction of 1.55. The lens has a front radius of 2.50 cm and a back radius of 3.00 cm.
(a) The signs of R1 and R2 are (1) +, +, (2) +, -, (3) -, +, (4) -, -. Explain.
(b) What is the focal length of the lens?
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