# Parabolic Mirror, Illustration

All conic sections possess a mirror property which, in case of parabola, guarantees that the light emitted from a source located at the focus of a parabola and reflected off its inner surface travels along a straight line parallel to the axis of the parabola. The applet below is a simple illustration of this property.

The flashlights and automotive front lights have a light source at the focus of a parabolic mirror. Modern radio telescopes work on this principle as well but in reverse, collecting the rays from a distant source in the focus of a prabolic antena. Dish TV also works on this principle.

What if applet does not run? |

### Conic Sections > Parabola

- The Parabola
- Archimedes Triangle and Squaring of Parabola
- Focal Definition of Parabola
- Focal Properties of Parabola
- Geometric Construction of Roots of Quadratic Equation
- Given Parabola, Find Axis
- Graph and Roots of Quadratic Polynomial
- Greg Markowsky's Problem for Parabola
- Parabola As Envelope of Straight Lines
- Generation of parabola via Apollonius' mesh
- Parabolic Mirror, Theory
- Parabolic Mirror, Illustration
- Three Parabola Tangents
- Three Points on a Parabola
- Two Tangents to Parabola
- Parabolic Sieve of Prime Numbers
- Parabolic Reciprocity
- Parabolas Related to the Orthic Triangle

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