Which one of the following frequencies of radiation (in $\mathrm{Hz}$ ) has a wavelength of $600…

Which one of the following frequencies of radiation (in $\mathrm{Hz}$ ) has a wavelength of $600 \mathrm{~nm} ?$
  1. $2.0 \times 10^{13}$
  2. $5.0 \times 10^{16}$
  3. $2.0 \times 10^{14}$
  4. $5.0 \times 10^{14}$

Solution

$\begin{aligned} v & =\frac{c}{\lambda} \\ & =\frac{3 \times 10^8}{600 \times 10^{-9}} \\ v & =5 \times 10^{14} \mathrm{~Hz}\end{aligned}$

Asked in: AP EAMCET 2011

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