The intensity (also called the radiance) of E-M radiation is defined as the energy per unit time (Watts) per unit area per increment in wavelength and per unit solid angle. A "Solid angle" describes the "angle" of a cone, that is, the area subtended by a cone divided by the cone length squared. This ratio is given the unit name "steradian". Determine the solid angle defined by a 1 square meter area at a distance of 100 meters.