Question

define the solid angle​

Answer 1

Answer:

solid angle is a 3D angular volume that is defined analogously to the definition of a plane angle in two dimensions. ... A solid angle, ω, made up of all the lines from a closed curve meeting at a vertex, is defined by the surface area of a sphere subtended by the lines and by the radius of that sphere,

Answer 2

Answer:

an angle in a 3 dimensional space is called solid angle