<P> The concept of quantization of radiation was discovered in 1900 by Max Planck , who had been trying to understand the emission of radiation from heated objects , known as black - body radiation . By assuming that energy can only be absorbed or released in tiny , differential , discrete packets he called `` bundles '' or `` energy elements '' , Planck accounted for certain objects changing colour when heated . On December 14 , 1900 , Planck reported his findings to the German Physical Society , and introduced the idea of quantization for the first time as a part of his research on black - body radiation . As a result of his experiments , Planck deduced the numerical value of h , known as the Planck constant , and could also report a more precise value for the Avogadro -- Loschmidt number , the number of real molecules in a mole and the unit of electrical charge , to the German Physical Society . After his theory was validated , Planck was awarded the Nobel Prize in Physics for his discovery in 1918 . </P>
<P> The concept of quantization of radiation was discovered in 1900 by Max Planck , who had been trying to understand the emission of radiation from heated objects , known as black - body radiation . By assuming that energy can only be absorbed or released in tiny , differential , discrete packets he called `` bundles '' or `` energy elements '' , Planck accounted for certain objects changing colour when heated . On December 14 , 1900 , Planck reported his findings to the German Physical Society , and introduced the idea of quantization for the first time as a part of his research on black - body radiation . As a result of his experiments , Planck deduced the numerical value of h , known as the Planck constant , and could also report a more precise value for the Avogadro -- Loschmidt number , the number of real molecules in a mole and the unit of electrical charge , to the German Physical Society . After his theory was validated , Planck was awarded the Nobel Prize in Physics for his discovery in 1918 . </P>
who discovered that energy travels in discrete units that he called quanta
who discovered that energy travels in discrete units that he called quanta
Max Planck
Max Planck