Introduction: This Daemon will calculate blackbody radiation using Planck's law. It takes the temperature and two wavelegths as input, and produces the emissive power (sigma*T^4), intensity, spectral intensity, fraction of area included within the band defined by the two wavelengths, and the band intensity (Siegel and Howell).

Instructions/Tips/Examples:

Q. The Sun has an effective blackbody temperature of 5555 K. What fraction of radiation is contained in the visible domain (0.4-0.7 mic)?

A. Enter the temperature and lambda_1 (0.4) and lambda_2 (0.7 mic). A 'Calculate' produces F=35.5%.

Q. What is the wavelength at which a blackbody at room temperature (300 K) emits its peak intensity?

A. Enter the temperature (300 K). A 'Calculate' produces Lambda_max=9.66 micron.