Solid angle
= Solid angle
{title2=$\Omega$}
{wiki}
A solid angle is the area cut out on a unit <two-sphere> by a cone of directions. Its SI unit is the steradian, and a full sphere subtends $4\pi$ steradians.
= Solid angle
{title2=$\Omega$}
{wiki}
A solid angle is the area cut out on a unit <two-sphere> by a cone of directions. Its SI unit is the steradian, and a full sphere subtends $4\pi$ steradians.