Is it worth learning the Planck’s law to use a blackbody?
- For any given wavelength, the Radiance level is an increasing function of the temperature,
- For any given temperature, the Spectral Radiance curve reaches a maximum which wavelength can be easily calculated from the easy-to-remember Wien’s law
Example: a blackbody at 800K (i.e. 527°C approx.) emits its maximum radiation at about 3.6 µm, i.e. in the MWIR spectral range.