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## Homework Statement

A candle is placed 10 inches from a convex lens whose focal length is 5 in. Where will the image be formed? How large an image is formed?

## Homework Equations

## The Attempt at a Solution

Here we use the following formula to find where the image will be formed:

1/f=1/Do+1/Di 1/Di=1/f-1/Do =

1/Di=1/5-1/10 = 2-1/10 = 10 in.

Here's the equation to solve part B but I don't know how to figure "So" which would be dimensions of the candle. Any help?

Si=So(Di/Do) =

Si=So(10/10) =