(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A plane convex lens is made of glass (index 1.42) with one flat surface and the other having a radius of 24 cm. What is the focal length of the lens? Anwer in united of cm.

2. Relevant equations

Lensmaker Equation

1/f=(n-1)*((1/r1)-(1/r2))

3. The attempt at a solution

f=1/[(n-1)*(1/r1)-(1/r2))]

f=1/[(1.42-1)*((1/-24cm)-(1/0))]

f=-57.142857

Is this right?? If the surface is flat on the lens, radius is given as 0 then correct? please check my work.

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# Homework Help: Optics: Lensmaker's Equation

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