steradian

• Sustantivo que designa la unidad de medida del ángulo sólido en el Sistema Internacional, definida como el ángulo sólido que, con vértice en el centro de una esfera, corta sobre la superficie de esta un área igual al cuadrado del radio.

A noun referring to the SI unit of solid angle, defined as the solid angle subtended at the center of a sphere by an area on its surface equal to the square of the sphere's radius.

1. C2formalscientific

   The SI unit of solid angle, equal to the solid angle subtended at the center of a sphere by an area on its surface equal to the square of the sphere's radius.

   Estereorradián

   • The total solid angle of a sphere is 4π steradians.
   • The intensity of the light source was measured in lumens per steradian.
   • A full sphere contains approximately 12.57 steradians.