...slightly from its central position. Part II — Magnifying Power of Telescope By magnifying power is meant the ratio of the angle which the image subtends at the eye to that subtended by the object. By making certain approximations, it can be shown that this y equals...

...object be viewed directly and also through a telescope, the magnification produced is estimated by the ratio of the angle which the image subtends at the eye to the angle which the object subtends when viewed directly in its actual position. This ratio depends on the position...

...at the distance of distinct vision from the eye placed close behind the eyepiece. Magnifying Power. The magnifying power of a microscope is defined as the ratio of the angle subtended at the eye by the final virtual image to the angle subtended at the eye by the object when...