Which one of the following frequencies of radiation (in $Hz$) has a wavelength of $600 \ nm$?

  • A
    $2.0 \times 10^{13}$
  • B
    $5.0 \times 10^{16}$
  • C
    $2.0 \times 10^{14}$
  • D
    $5.0 \times 10^{14}$

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