An Electron Microscope Operates with Electrons of Kinetic Energy 50

question 10

Multiple Choice

An electron microscope operates with electrons of kinetic energy 50.0 keV.What is the wavelength of these electrons? Assume this speed is not relativistic.(h = 6.63 x 10^-34 J*s,c = 3.00 x 10⁸ m/s,1 eV = 1.60 x 10^-19 J,and m_e = 9.11 x 10^-31 kg)

• A)9.28 x 10^-10 m
• B)7.14 x 10^-11 m
• C)5.49 x 10^-12 m
• D)2.75 x 10^-13 m

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