Weitere Beispiele werden automatisch zu den Stichwörtern zugeordnet - wir garantieren ihre Korrektheit nicht.
A primary concave parabolic mirror converges the light to one focus of a concave ellipsoidal mirror.
(In the special case of a circle with a source at its center all light would be reflected back to the center.) If the ellipse is rotated along its major axis to produce an ellipsoidal mirror (specifically, a prolate spheroid), this property will hold for all rays out of the source.