An Electron Has the Same De Broglie Wavelength as the Wavelength

question 45

Multiple Choice

An electron has the same de Broglie wavelength as the wavelength of a 1.8 eV photon.What is the speed of the electron? (m_electron = 9.11 × 10^-31 kg,c = 3.00 × 10⁸ m/s,1 eV = 1.60 × 10^-19 J)

• A)1,100 m/s
• B)980 m/s
• C)910 m/s
• D)840 m/s
• E)770 m/s

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