Optical Properties of the Parabola

Download Geometry Expressions File

A line through the focus and a line perpendicular to the directrix make the same angle with the tangent.

Any ray of light parallel to the axis of the parabola is reflected through the focus.

Expressions

Name Input
Locus Eq Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
Angle 1 Eq Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
Angle 2 Eq Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
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