Optics.
the surface to which all light rays emanating from a single point and reflected by a curved surface, as a concave mirror, are tangent. Also called caustic .
[ 1865-70 ]
Optics.
the surface to which all light rays emanating from a single point and reflected by a curved surface, as a concave mirror, are tangent. Also called caustic .
[ 1865-70 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012