Question

A certain radio station broadcasts on a frequency of 1890 kHz (kilohertz). What is the wavelength of the electromagnetic radiation broadcasted by the station?

• A. 158.7 m
• B. 100.5 m
• C. 135.9 m
• D. 88.2 m

Answer 1

The correct option is A 158.7 m

We know, $c=v\lambda$
Where, $\lambda$ is the wavelength of the electromagnetic radiation, $c$ is the speed of light and $v$ is the frequency of the radiation
Given:
Freqeuncy $\left(v\right)=1890kHz=1890\times {10}^{3}Hz$
Therefore,
$\lambda =\frac{c}{v}=\frac{3\times {10}^8{\text{m s}}^{-1}}{1890\times {10}^3{\text{s}}^{-1}}=158.7m$