Chapter 7, Problem 15E

Interpretation Introduction

Interpretation:

The wavelength of an electron travelling at $1.15\times {10}^5\text{m/s}$ is to be calculated.

Concept introduction: According to de Broglie the kinetic energy of electron is dependent on the movement of electron and its wavelength. De Broglie relation states that if the electron is moving fast then it is having higher kinetic energy and shorter wavelength. The expression for the same is,
$\lambda =\frac{h}{\text{mv}}$

The value of Planck’s constant $\left(h\right)$ is $6.626\times {10}^{-34}\text{J}$ .

To determine: The wavelength of an electron travelling at $1.15\times {10}^5\text{m/s}$ .