The frequency of a light wave is $12 \times 10^{14} \ s^{-1}$. The wave number associated with it is .......
- A$5 \times 10^{-7} \ m$
- B$4 \times 10^{-8} \ cm^{-1}$
- C$2 \times 10^{-7} \ m^{-1}$
- D$4 \times 10^4 \ cm^{-1}$
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