Irradiance of the surface area per device frequency or wavelength. The conditions spectral flux density or even more confusingly "spectral intensity" can also be used. Non-SI units of spectral irradiance contain Jansky = ten W⋅m⋅Hz and photo voltaic flux device (1SFU = 10 W⋅m⋅Hz). not Substantially in amount; a https://chrisn530ktc9.activablog.com/profile