Question

A particular station of All India Radio, New Delhi, broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is:
Speed of light :
$c=3\times {10}^{8}m/s$

• A. 219.2 m
• B. 2192 m
• C. 21.92 m
• D. 219.3 m

Answer 1

The correct option is D 219.3 m

$\text{Wavelength}\left(\lambda \right)=\frac{c}{\nu }$
$c\text{is speed of light}\nu \text{is frequency}$
$\lambda =\frac{3\times {10}^8}{1368\times {10}^3}=219.298m=219.3m$