A yellow radiation having wavelength 5800 Å. The wavenumber (a) and frequency (b) of yellow radiation are respectively-

$$\begin{gathered} 1. \mathrm{a} =172.4 \times {10}^4 {\mathrm{cm}}^{-1}, \mathrm{b} = 5.172 \times {10}^{14} {\mathrm{s}}^{-1} \\ \mathrm{} \end{gathered}$$

$$\begin{gathered} 2. \mathrm{a} = 5.172 \times {10}^{14} {\mathrm{s}}^{-1}, \mathrm{b} =17.24 \times {10}^4 {\mathrm{cm}}^{-1} \\ \mathrm{} \end{gathered}$$

$$\begin{gathered} 3. \mathrm{a} = 724 \times {10}^5 {\mathrm{cm}}^{-1}, \mathrm{b} = 5.172 \times {10}^{15} {\mathrm{s}}^{-1} \\ \mathrm{} \end{gathered}$$

$4. \mathrm{a} =1.724 \times {10}^4 {\mathrm{cm}}^{-1}, \mathrm{b} = 5.172 \times {10}^{14} {\mathrm{s}}^{-1}$