Question

define plane angle and solid angle​

Answer 1

Answer:

Solid angle is the angle subtended by a plane area, at the given point assuming that point to be the center of the great sphere of which the plane be a section. Whereas a plane angle is the angle subtended by any line at a given point for whole of its length.

Answer 2

Explanation

The definition of intensity involves the concept of a solid angle. A solid angle is a 3D angular volume that is defined analogously to the definition of a plane angle in two dimensions.

The definition of intensity involves the concept of a solid angle. 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. The dimensionless unit of plane angle is the radian, with 2π radians in a full circle.