Irradiance of the surface area per device frequency or wavelength. The conditions spectral flux density or even more confusingly "spectral intensity" can also be made use of. Non-SI models of spectral irradiance include Jansky = 10 W⋅m⋅Hz and photo voltaic flux unit (1SFU = 10 W⋅m⋅Hz). word #beta Beta https://harlani297zho3.wikihearsay.com/user