A ray approaches a concave mirror parallel to its axis. Where does the reflected ray go?

1. A ray approaching a concave converging mirror parallel to its axis is reflected through the focal point F of the mirror on the same side. 2. The focal point of a concave mirror lies in front of the mirror because the mirror converges real light there. 3. This is the first of the ray tracing rules for mirrors and it mirrors the first rule for converging lenses. 4. A focal point behind the mirror belongs to the convex case, where the reflected rays only appear to come from it. _Source: OpenStax College Physics (CC BY 4.0), Ch 25 "Geometric Optics", section 25.7 Image Formation by Mirrors_