Question

what is steradian....

Answer 1

hey mate here refers to your answer.
the SI unit of solid angle , equals to the angle on the centre of a sphere .
hope it helps if yes So please mark me as brainliest.

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.