A Nonrelativistic Electron Has a Kinetic Energy of 5

question 44

Multiple Choice

A nonrelativistic 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? (m_el = 9.11 × 10^-31 kg,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10^-19 J)

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

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