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Chemistry · PYQ NEET UG 2021

हिन्दी

A particular station of All India Radio, New Delhi broadcasts on a frequency of \( 1368\text{ kHz} \) (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is _______. [Speed of light, \( c = 3.0 \times 10^{8}\text{ m s}^{-1} \)]

  1. \( 219.2\text{ m} \)
  2. \( 2192\text{ m} \)
  3. \( 21.92\text{ cm} \)
  4. \( 219.3\text{ m} \)

Correct answer · Option 4

\( 219.3\text{ m} \)

Explanation

Wavelength \( \lambda = \frac{c}{\nu} = \frac{3.0 \times 10^{8}}{1368 \times 10^{3}} = 219.29\text{ m} \approx 219.3\text{ m} \).
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