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The energy and momentum of an electron are related to the frequency and wavelength of the associated matter wave by the relations : E=hv" "p=(h)/(lamda). But while the value of lamda is physically significant, the value of v (and therefore, the value of the phase speed vlamda) has no physical significance. why? |
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Answer» <P> Solution :The absolute vlaue of energy E and any particle is arbitrary with zero level of energy FIXED at our convenience but absolute value of momentum p is always fixed for a given frame of reference.hence, while `lamda=(h)/(p)` is physically SIGNIFICANT, value of `v=(E)/(h)` for matter wave of an electron has no DIRECT physical meaning. the phase speed `vlamda` is likewise not physically significant. |
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