Wave property of electrons implies that they will show diffraction ...
0Wave property of electrons implies that they will show diffraction effects. Davisson and Germer
\( \mathrm{P} \) demonstrated this by diffracting electrons from crystals. The law goveming the diffraction from a crystal
W is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively(see in figure).
If a strong diffraction peak is observed when electron are incident at an angle 'i' from the normal to the crystal planes with distance ' \( d \) ' between them (see figure), de Broglie wavelength \( \lambda_{d B} 0 \) electrons can be calculated bythe relationship ( \( n \) is an integer)
(A) \( d \sin i=n \lambda_{d B} \)
(B) \( 2 d \cos \mathrm{i}=n \lambda_{\mathrm{dB}} \)
(C) \( 2 d \sin i=n \lambda_{d B} \)
(D) \( d \cos i=n \lambda_{d B} \)
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