Lens maker equation:

$\overline{)\frac{\mathbf{1}}{{\mathbf{s}}_{\mathbf{o}}}{\mathbf{+}}\frac{\mathbf{1}}{{\mathbf{s}}_{\mathbf{i}}}{\mathbf{=}}\frac{\mathbf{1}}{\mathbf{f}}}$

Magnification:

$\overline{){\mathbf{m}}{\mathbf{=}}{\mathbf{-}}\frac{{\mathbf{s}}_{\mathbf{i}}}{{\mathbf{s}}_{\mathbf{o}}}}$

**a.**

From the lens maker equation:

1/s_{1}_{i} = 1/f_{1} - 1/s_{1}_{o} = 1/5 - 1/4 = - 1/20

The figure shows a combination of two lenses

a. Find the position of the final image of the 1.0 cm tall object

b. Find the size of the final image of the 1.0-cm-tall object

c. Find the orientation of the final image of the 1.0-cm-tall object

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