Real situations are overlaid with virtual information using augmented reality technology. In a learning environment, this technology could give everyday relevance to abstract concepts. In this paper, we will show how physical structures in typical experiments can be simply augmented by virtual objects in physics classes. This is achieved by modelling objects with the "GeoGebra" software and overlaying visualisations of non-tangible, physical properties such as force arrows, colour-coded potential and light rays. Using the "GeoGebra 3D Calculator" app on a smartphone or tablet, these models can be displayed on any surface seen through the camera and dynamically adapted to real structures such as inclined planes, simple circuits or plane mirrors. As a result, elements that are normally not observable are visualised and contribute to understanding the phenomenon. Based on these ideas, further so-called augmented reality experiments can be devised from these examples. Augmenting real experiments with representations of physical concepts should enable students to see the world through the lens of a scientist and gain a deeper understanding.