Question

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

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

Answer 1

Answer: (B)

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

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

$=219.3 \,m$

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