(a) Repeat the derivation of Eq. (34.19) for the case in
Chapter 34, Problem 34.92(choose chapter or problem)
(a) Repeat the derivation of Eq. (34.19) for the case in which the lens is totally immersed in a liquid of refractive index nliq. (b) A lens is made of glass that has refractive index 1.60. In air, the lens has focal length +18.0 cm. What is the focal length of this lens if it is totally immersed in a liquid that has refractive index 1.42?
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