The Paradox of a Commercial Mirror

Authors

  • Pavel Leischner Pedagogical Faculty, University of South Bohemia, České Budějovice

Abstract

The article analyses an apparent paradox observed in the image of an object in an ordinary commercial mirror, whose reflective layer is covered by a glass plate. The author investigates whether the covering glass layer can cause a displacement or an apparent change in the size of the image. Using geometrical optics and ray-tracing simulations in a dynamic geometry environment, the article shows how the image of a point is formed in such a mirror and how it depends on the thickness of the glass, the refractive index, and the observer’s position. The conclusion indicates that the initial photograph does not prove a real enlargement of the image, but the topic offers a useful basis for experimental work in physics.

Published

2026-06-01

How to Cite

Leischner, P. (2026). The Paradox of a Commercial Mirror. MATHEMATICS–PHYSICS–INFORMATICS, 35(2), 115–124. Retrieved from https://www.mfi.upol.cz/index.php/mfi/article/view/1113

Issue

Section

Physics