The de Broglie wavelength of an electron is the same as that of a 50 K – McqOptions

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1.	The de Broglie wavelength of an electron is the same as that of a 50 KeV X-ray photon. The ratio of the energy of the photon to the kinetic energy of the electron is: (the energy equivalent of electron mass is 0.5 MeV)
A.	1 : 50
B.	1 : 20
C.	0.834027777777778
D.	2.08402777777778
Answer» D. 2.08402777777778

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