An electron beam can undergo diffraction by crystals. Through what potential should a beam of el....

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An electron beam can undergo diffraction by
\( \mathrm{P} \)
crystals. Through what potential should a beam of electrons be accelerated so that its wavelength becomes equal to \( 1.54 \AA \) ?
(A) 54.3 volt
(B) 63.3 volt
(C) 66.2 volt
(D) None of these


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