"Radiant Fluence"@en . . . "\\(H_0 = \\int_{0}^{\\Delta t}{E_0}{dt}\\), where \\(E_0\\) is the spherical radiance acting during time interval with duration \\(\\Delta t\\)."^^ . . . . "H_e,0" . "Radiant fluence rate, or spherical irradiance, is equal to the total radiant flux incident on a small sphere divided by the area of the diametrical cross-section of the sphere." . .