Question

The wavelength of a radiowave of frequency 1 MHz is :

• A. 400 m
• B. 300 m
• C. 350 m
• D. 200 m

Answer 1

The correct option is B 300 m

Velocity of radiowaves $c=3\times {10}^{8}m/s$
Frequency $\nu ={10}^{6}Hz$
$\lambda =\frac{c}{\nu }=\frac{3\times {10}^8}{1\times {10}^6}$
$\lambda =3\times {10}^2=300m$