Blackbody

Joachim Köppen Kiel May 2017

The blackbody spectrum is the thermal emission of a perfectly absorbing body at a given temperature. This tool displays the spectrum as a function of frequency, wavelength, and energy in terms of photon flux or energy flux (red curve). It also computes the energy or the number of photons emitted in a given frequency band (between blue vertical lines).

Hitting the Enter key after entering a parameter will refresh the display.

Temperature [K]:

Integration between

energy flux [W/m²]:

fraction of energy flux:

photon flux [phot/s/m²]:

fraction of photon flux:

X =

Y =

Integration between

energy flux [W/m²]:

fraction of energy flux:

photon flux [phot/s/m²]:

fraction of photon flux:

X =

Y =