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An electron and a photon each have a wav...

An electron and a photon each have a wavelength of 0.25 nm. What is the momentum `("in "kg m//s)` of the (a) electron and (b) photon? What is the energy (in eV) of the (c) electron and (d) photon?

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(a) `3.3xx10^(-24)kg.m//s,` (c) 38eV, (d) 6.2keV
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