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A non-relativistic electron has a kinetic energy of 5.4 eV. What is the energy of a...

A non-relativistic electron has a kinetic energy of 5.4 eV. What is the energy of a photon whose wavelength is the same as the de -Broglie wavelength of the electron?

the electron?

A) 2.4 keV B) 2.2 keV C) 2.0 keV D) 2.5 keV E) 2.7 keV

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