Question

Microwaves used in microwave ovens often have a wavelength of about 12 cm. What is the frequency of these waves? The speed of light is 3 × 108 m/s.

Answer 1

Answer:

Frequency, $\nu=2.5\times 10^9\ Hz$

Explanation:

It is given that,

Microwaves used in microwave ovens often have a wavelength of about 12 cm, $\lambda=12\ cm=0.12\ m$

Speed of light, $c=3\times 10^8\ m/s$

The relation between speed, wavelength and frequency is given by :

$\nu=\dfrac{c}{\lambda}$

$\nu=\dfrac{3\times 10^8}{0.12}$

$\nu=2.5\times 10^9\ Hz$

So, the frequency of the microwave oven is $2.5\times 10^9\ Hz$. Hence, this is the required solution.