Spectral Exitance (real surface)
Description
The spectral exitance of a real surface around a given frequency or wavelength, according to the Lambert’s cosine law and the Planck’s law, is equal to the formula shown here.
Related formulasVariables
| Meλ | spectral exitance (watt/m3) |
| π | pi |
| h | Planck constant |
| c | Speed of light |
| λ | wavelength (m) |
| e | e |
| k | Boltzmann constant |
| T | temperature of that surface (K) |