Simple magnifier is a converging lens, placed between the object and the eye, with the object inside the focal length of the lens. The angular magnification of a simple magnifier is:
where f is the focal length of the lens and 15 cm is the near point distance for a normal eye. The image of the object is virtual, which means that the rays do not actually pass through the point of intersection, that is, it can not be seen on a screen.
Generalic, Eni. "Simple magnifier." Croatian-English Chemistry Dictionary & Glossary. 29 June 2022. KTF-Split. {Date of access}. <https://glossary.periodni.com>.
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