The wavelength of the yellow line of sodium is $5896 \mathring{A}$. Its wave number will be:
- A$50883 \times 10^{10} \, \text{per second}$
- B$16961 \, \text{per cm}$
- C$17581 \, \text{per cm}$
- D$50883 \, \text{per cm}$
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