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**

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