Black Body Radiation

• Wien’s Law: Radiation depends on Temperature of radiating body

T = b

b = 2.989x10-3 m deg

T in deg K

Sun ~ 6000oK sun = 2.989x10-3 m-deg/6000oK = 0.4x10-6 m

Earth ~ 300oK sun = 2.989x10-3 m-deg/300oK = 10x10-6 m

visibleultraviolet infrared