Question

what is steradian????

Answer 1

hey dear...!

the SI unit of solid angle, equal to the angle at the centre of a sphere subtended by a part of the surface equal in area to the square of the radius.

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Answer 2

Answer:

Steradian or 1 steradian is the solid angle subtended by a part of the surface of a sphere at the centre of the sphere when the area of the part is equal to the square of the radius of the sphere.

Explanation:

The area of a spherical surface subtends an angle at the centre of the sphere. This angle is called the solid angle.