Irradiance of the surface for each device frequency or wavelength. The terms spectral flux density or more confusingly "spectral depth" can also be applied. Non-SI models of spectral irradiance include things like Jansky = 10 W⋅m⋅Hz and photo voltaic flux device (1SFU = 10 W⋅m⋅Hz). The Dean of Devices https://chanakyag208dmv6.snack-blog.com/profile