Electron accelerated by potential \(V\) are diffracted from a crystal. If \(d=1 A\) and \(i = 30...

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Electron accelerated by potential \(V\) are diffracted from a crystal. If \(d=1 A\) and \(i = 30^\circ \). \(V\) should be about  \(h = 6.6 \times {10^{ - 24}}Js\,{m_e} = 9.1 \times {10^{ - 33}}kg.e = 1.6 \times {10^{ - 19}}C\)
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