Question

Calculate the de Broglie wavelength of helium nucleus (mass = 6.64 x 10^-27 kg) moving at a velocity of 2.54 x 10^7 m/s

A. 6.57 x 10^-14 m

B. 3.96 x 10^-15 m

C. 8.68 x 10^-59 m

D. 4.55 x 10^8

E. 8.64 x 10^-16

Answer 1

de Broglie wavelength   = h / m v

                                     = (6.625 x 10^-34 ) / (6.64 x 10^-27 x 2.54 x 10^7)

                                     = 3.96 x 10^-15 m

answer : B. 3.96 x 10^-15 m