Question

What are the differences between plane angle and solid angle? [ 2 marks]

Answer 1

1. Plane Angle:

• Angle between the intersection of two lines or planes.
• It is two dimensional.
• Unit is radian.

Solid Angle:

• Angle between the intersection of three or more planes at a common point.
• It is three dimensional.
• Unit is steradian.

[2 Marks]