Question

The Vividh Bharati Station of All India Radio, Delhi, broadcasts on a frequency of $1,368kHz.$ Calculate the wavelength of the electromagnetic radiation emitted by transmitter. Which part of the electromagnetic spectrum does it belong to?

• A. $21.93m$ and radiowave
• B. $219.3m$ and radiowave
• C. $219.3m$ and microwave
• D. $219.3m$ and $X$ -rays

Answer 1

Answer: (B)

$v=1,368\times 10^{3}Hz$

$\lambda =\frac{c}{v}=\frac{3\times 10^{8}m/s}{1,368\times 10^3{s}^{-1}}$

$=219.3m$

The range of wavelength of radio waves is $1mm$ to $100km$.