Answer to Question #126103 in Atomic and Nuclear Physics for Otika Harmony

Question

What is the wavelength of an electron moving at 5.31×10⁶m/sec?

Answer 1

Given mass of electron is $9.11\times10^{31}kg$

$h=6.626\times10^{34}J.s$

de Broglie's Equation is

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

$\lambda=\frac{6.626\times10^{34}J.s}{9.11\times10^{31} kg\times5.31\times106m/sec}$

$\lambda=\frac{6.626\times10^{34}J.s}{4.84\times10^{24}kg.m/sec}$

$\lambda=1.37\times10^{10}m$

Therefore the wavelength an electron moving is $1.37\times10^{10}m$