Question

what is difference between angle and solid angle?​

Answer 1

Explanation:

solid angle is a 3D angular volume that is defined analogously to the definition of a plane angle in two dimensions. ... A plane angle, θ, made up of the lines from two points meeting at a vertex, is defined by the arc length of a circle subtended by the lines and by the radius of that circle

Answer 2

Solid Angle : -A solid angle is a 3D angular volume that is defined analogously to the definition of a plane angle in two dimensions.

Plane Angle :- A plane angle, θ, made up of the lines from two points meeting at a vertex, is defined by the arc length of a circle subtended by the lines and by the radius of that circle, as shown below.