Step 1: The lens maker's formula is given by:
$$ \frac{1}{f} = (n-1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right) $$
where:
* $f$ is the focal length of the lens
* $n$ is the refractive index of the lens material
* $R_1$ is the radius of curvature of the first
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