Question

what is one steradian? ​

Answer 1

Hey mate ,

A steradian can be defined as the solid angle subtended at the center of a unit sphere by a unit area on its surface.

For a general sphere of radius r, any portion of its surface with area A = r2 subtends one steradian at its center.

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Answer 2

Answer:

$\huge\mathcal{\pink{\boxed{\blue{heya}}}}$

One steradian is the solid angle subtended at the centre of a sphere by that area of the surface of the sphere which is equal to the square of the radius of the sphere.

1 sphere= 4π = 12.57 sr.