Angular Magnification
We were given a formula to find angular magnification, and I can't figure out what one of the variables is supposed to represent.
Angular magnification=m*do/di
di is the distance to the image, and m is the magnification of the lens system, what does do represent? I'm looking at an example problem, and it doesn't match any of the distances given, but it has to represent some sort of distance (or distances added together)
