MCQ
A particular station of All India Radio, New Delhi, broadcasts on a frequency of $1,368\, \mathrm{kHz}$ $(kilohertz).$ The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light $\left.c=3.0 \times 10^{8}\, \mathrm{~ms}^{-1}\right]$
  • $219.3\, \mathrm{~m}$
  • B
    $219.2\, \mathrm{~m}$
  • C
    $2192 \,\mathrm{~m}$
  • D
    $21.92 \,\mathrm{~cm}$

Answer

Correct option: A.
$219.3\, \mathrm{~m}$
a
$\gamma=\frac{C}{\lambda}$

$\lambda=\frac{C}{\gamma}$

$\lambda=\frac{3 \times 10^{8}}{1368 \times 10^{3}}$

$\lambda=219.29=219.3\, \mathrm{~m}$

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