Calculate the wavelength of an electron of its kinetic energy is 3.0×10-25 J.
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Calculate the wavelength of an electron of its kinetic energy is 3.0×10-25 J.
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λ = h/p, E = p2/(2m), p = √(2mE), λ = h/√(2mE). The energy of the electron is 25000 eV * 1.6*10-19 J/eV = 4*10-15 J. λ = (6.626*10-34 Js)/√(2*9.1*10-31 kg*4*10-15 J) = 7.8*10-12 m. This wavelength is approximately 100 times smaller than the typical size of an atom.
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