significance of acceptance angle
it is same as surface and volume ! a plane angle is 2D and solid angle is 3D
It is a solid angle, or an angle in 3-d space.
A solid angle is 3-dimensional, a planar angle is 2-d.
Solid angle is vector quantity. BY WAHID BUX MAHAR
A solid angle, measured from a vertex, is the ratio between the area subtended by the angle at the vertex and the the square of the distance to the vertex. The unit of measurement is the stradian.
because potato. -kirby A.
SI unit of plane angle is radians (rad) and that of solid angle is steradian (sr)
a solid figure that has a right angle
solid angle is the ratio of the intercepted area dA of the spherical surface , described about the apex O as the centre ,to square of its radius r