Chapter 19, Problem 72A

To determine

The wavelength of microwaves in oven.

Answer to Problem 72A

  $0.125\text{m}$

Explanation of Solution

Given:

The frequency of microwaves, $f=2.4\text{GHz}$

Formula used:

The relation between wavelength and frequency as,

  $\lambda =\frac{c}{f}$

Where

  $\begin{array}{l}\lambda =\text{wavelength}\\ f=\text{frequency}\\ c=\text{ speed of light}=3\times {10}^8\text{m/s}\end{array}$

Calculation:

Using the above mentioned formula and the given values, the wavelength of microwaves will be,

  $\begin{array}{c}\lambda =\frac{c}{f}\\ =\frac{3\times {10}^8}{2.4\times {10}^9}\\ =0.125\text{m}\end{array}$

Conclusion:

Hence, the wavelength of microwaves is $0.125\text{m}$ .