# Holograms:

The Boundary Between Geometric & Wave Optics

April 13, 2019

Talk given at the Spring Meeting of the Indiana Section of AAPT in April, 2019.

## Abstract

We will use the geometric definition of a parabola to explore the properties of concave and convex mirrors. We will then expand this discussion to explore the properties of a hyperbolic mirror. Finally, we will demonstrate how a holography takes advantage of the hyperbolic nature of wave interference in order to construct what is essentially a geometric phenomenon.