Answer to Question #115967 in Electricity and Magnetism for ari

Question

Calculate the momentum of a particle knowing that its wavelength is 10.13 x 10^-5 m.

Answer 1

Given data

Wavelength is p=10.13x10^-5 m

Planck's constant is h=6.626x10^-34 J.s

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According to de Broglie hypothesis, the wavelength of matter wave is

$\lambda=\frac{h}{p}$

The momentum of the particle is

$p=\frac{h}{\lambda}$

$=\frac{6.626*10^{-34} J.s}{10.13*10^{-5} m}$

$=6.54*10^{-30} kg.m/s$