# Spectral Irradiance Calculator

Posted by Dinesh onOnline antenna calculator to calculate **spectral irradiance** in frequency of a surface using irradiance formula.

## Calculate Spectral Irradiance in Frequency of a Surface

### Formula:

E_{e,?} = [?E_{e} ÷ ??]

? = frequency,

E

_{e}= irradiance,

? = partial derivative symbol,

E

_{e,?}= spectral irradiance in frequency