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Define SI unit of solid angle.

Answer» Steradian<br>Its steradian<br>Steradian<br>Steradian<br>Steradian is the si unit of solid angle<br>SI unit of solid angle:A\xa0steradian is the SI unit of solid angle.It can be defined as the solid angle substended at a center of an unit,sphere by a unit area on its surface.For a general sphere of radius r, any portion on its surface with area A= r2\xa0


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