Chapter 1st
B.sc 1st year Book
(Page 3)
Contents
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Experimental Verification of de-Broglie’s equation
The revolutionary postulate of de-Broglie has been confirmed by Davisson and Germer’sexperiment in 1927 . Similarly experiments which carried out independently by G.P. Thomson in 1928 and later Stern observed that the beems of heavier particles (like
, He…. etc) showed diffraction patterns when reflected from the surfaces of crystals.
The pattern of the electron diffraction obtained by these scientists was found to be similar to that of X-ray diffraction (since the wave nature of -rays is well established hence electrons also should have a wave nature), In add
ition they observed that the wavelength of the electrons was also found to be similar with that calculated by de-Broglie. Hence, the dual nature of the electron and the quantitative nature of de-Broglie’s equation was established with high accuracy.
ition they observed that the wavelength of the electrons was also found to be similar with that calculated by de-Broglie. Hence, the dual nature of the electron and the quantitative nature of de-Broglie’s equation was established with high accuracy.Applications of de-Broglie Concept : The main applications of de-Broglie’s concept are
1. The development of electron microscope.
2. It theoretically supports the Bohr’s second postulate.
