- #1
quietrain
- 655
- 2
hi, i don't understand why the 2 converging lens telescope's magnification is given by M = f_o / f_e
where f_o = focal length of objective, and f_e = focal length of eyepiece...
issn't M = image distance / object distance...
in the case of a infinity object, the image is also infinity for the eye to view it without straining.
so why is there still a magnification ? infinity over infinity?
need help thanks a lot!
where f_o = focal length of objective, and f_e = focal length of eyepiece...
issn't M = image distance / object distance...
in the case of a infinity object, the image is also infinity for the eye to view it without straining.
so why is there still a magnification ? infinity over infinity?
need help thanks a lot!