Question: An electron has the same de Broglie wavelength as the wavelength of a 1.8 eV photon. What is the speed of the electron? (melectron =

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

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