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220 116. The de-Broglie wavelength of an electron of kinetic energy 9 eV is (take, h = 4x10-15 eV-s, c = 3 x 100 cm/s

220 116. The de-Broglie wavelength of an electron of kinetic energy 9 eV is (take, h = 4x10-15 eV-s, c = 3 x 100 cm/s and the mass m, of electron as m.c? = 0.5 MeV) (a) 4 x 10-8 cm (b) 3 x 108 cm (c) 4 x 10-7 cm (d) 3 x 10-7 cm m - X

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