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## Homework Statement

A student is working in an optics lab and has a light bulb which is 100 cm from a screen. She needs to make a real image a real image of the bulb on the screen and she has a converging lens with a focal length of +15 cm. Find two places she can put the lens and give object and image distances to both setups.

## Homework Equations

1/p + 1/q = 1/f

## The Attempt at a Solution

f = +15 cm, p = 100 cm, so

1/.15 - 1/1.00 = 1/q

q = 17.6 cm

and

f= + 10 cm, p = 66.66 cm, so

1/.10 - 1/.6666 = 1/q

q = 11.7 cm

Are these two distances correct?