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Question

A lens has one convex surface of radius $6.00 \mathrm{~cm}$ and one concave surface of radius $10.0 \mathrm{~cm}$. When an object is placed $35.0 \mathrm{~cm}$ from the lens, a real image is formed $50 \mathrm{~cm}$ from the lens.

(a) What is the focal length of the lens?

(b) What is the index of refraction of the lens?

Solution

VerifiedAnswered 2 years ago

Answered 2 years ago

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$\begin{align*} R_{1}&= 6\mathrm{~cm},\; \; \text{for convex side}\\ R_{2}&= 10\mathrm{~cm},\;\; \text{for concave side}\\ s&=35\mathrm{~cm}\\ s^{'}&= 50\mathrm{~cm},\;\; \text {real image}\\ \end{align*}$

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