Irradiance of the area per unit frequency or wavelength. The phrases spectral flux density or maybe more confusingly "spectral depth" can also be made use of. Non-SI units of spectral irradiance contain Jansky = ten W⋅m⋅Hz and photo voltaic flux device (1SFU = ten W⋅m⋅Hz). phrase #beta Beta /beta https://light-steel-structure-vil87765.boyblogguide.com/37700580/facts-about-light-steel-villa-revealed