distance of camera lins from mirror.
You are trying to photograph a bird sitting on a tree branch, but a tall hedge is blocking your view. However, as the drawing shows, a plane mirror reflects light from the bird into your camera. If x = 3.0 m and y = 4.2 m in the drawing, for what distance must you set the focus of the camera lens in order to snap a sharp picture of the bird's image?
heres what it looks like: http://img125.imageshack.us/img125/1508/p2506altfk2.gif
to me it seems I could use trig to find the distance, correct?
its just, none of the distances that are given, I couldn't manipulate them to work for the problem.
Please help me with this one.