Question

The solid angle is measured in ​

Answer 1

Explanation:

steradian

The SI unit of solid angle is the steradian (sr). The solid angle of a complete sphere is 4π sr. The solid angle corresponding to the face of a cube measured at the centre is 2π/3 sr. One steradian is equal to (180/π)2 square degrees.

Answer 2

The solid angle is measured in STERADIAN.

• The name is derived from the Greek στερεός stereos 'solid' + radian.
• The steradian (symbol - sr) or square radian is the SI unit of solid angle.
• It is used in three-dimensional geometry, and is analogous to the radian, which quantifies planar angles. Whereas an angle in radians, projected onto a circle, gives a length on the circumference, a solid angle in steradians, projected onto a sphere, gives an area on the surface.

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