__Lens equation:$\overline{)\frac{\mathbf{1}}{{\mathit{s}}_{\mathit{o}}}{\mathbf{+}}\frac{\mathbf{1}}{{\mathit{s}}_{\mathit{i}}}{\mathbf{=}}\frac{\mathbf{1}}{\mathit{f}}}$__

A 4.0-cm-tall candle flame is 2.0 m from a wall. You happen to have a lens with a focal length of 42cm.

A) How many places can you put the lens to form a well-focused image of the candle flame on the wall? Answer: 2

B) What are the distance between the candle and the lens for each location? Answer: 60 and 140 cm

C) For each location, what is the height of the image?

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