Question

Is magnification directly or inversely proportional to focal length in a spherical mirror... Higher the focal length higher the magnification or lower the focal length higher the magnification.... Pls reply..

Answer 1

Answer:

In most photography and all telescopy, where the subject is essentially infinitely far away, longer focal length (lower optical power) leads to higher magnification and a narrower angle of view; conversely, shorter focal length or higher optical power is associated with lower magnification and a wider angle of view.