Question

difference between solid angle and plane angle with neat labelled diagram​

Answer 1

Answer:

Plane angle is measured in radian while solid angle in steradian. Plane angle is measured by an arc on circle whose length is r units whereas solid angle is measured by an area on sphere whose area is r*r square units. Plane angle of full circle is 2π whereas solid angle of full sphere is 4π.

Answer 2

Answer:

A 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, as shown below.