posted by rick .
A camera is supplied with two interchangeable lenses, whose focal lengths are 35.0 and 150.0 mm. A woman whose height is 1.80 m stands 7.00 m in front of the camera. What is the height (including sign) of her image on the film, as produced by
(a) the 35.0-mm lens
(b) the 150.0-mm lens?
You can use the lens equation to find (given fo, objectdistance) image distance.
Then, use the magnification equation to find image height (di/do=hi/di)