Blackbody
(Planck) curves at different temperatures
•Blackbody emits at
all wavelengths
•Intensity of radiation
at every wavelength
® continuous curve
•Temp. of blackbody
determines l of peak
emission
0 Kelvins = - 273°C
(- 460°F)
e.g. room = 20°C, 293 K
1mm
