Module 5 : MODERN PHYSICS
Lecture 23 : Black Body Radiation
  Wien's Displacement Law :
The wavelength at which the radiant intensity is maximum is inversely proportional to the temperature of the black body. According to this law, hotter objects emit most of their radiation at shorter wavelength, which would make them appear more bluish. Similarly, cooler objects radiate in the red end of the spectrum, making them appear red.
 
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  See the animation
  The radiant intensity at a given temperature has a maximum when
   
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