Wave number of the lowest-energy line of a hydrogen spectral series in terms of R_H

1. A.
   $R_H\left(\frac{36}{5}\right)$
2. B.
   $R_H\left(\frac{5}{36}\right)$
3. C.
   $R_H\left(\frac{21}{100}\right)$
4. D.
   $R_H\left(\frac{100}{21}\right)$

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1. A.
   $\bar{v} = R_H \cdot \frac{3}{4}$
2. B.
   $\bar{v} = R_H \cdot \frac{5}{36}$
3. C.
   $\bar{v} = R_H \cdot \frac{4}{3}$
4. D.
   $\bar{v} = R_H \cdot \frac{36}{5}$

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1. A.
   $\bar{v} = R_H\left(\dfrac{5}{36}\right)\ \mathrm{cm^{-1}}$
2. B.
   $\bar{v} = R_H\left(\dfrac{36}{5}\right)\ \mathrm{cm^{-1}}$
3. C.
   $\bar{v} = R_H\left(\dfrac{144}{7}\right)\ \mathrm{cm^{-1}}$
4. D.
   $R_H\left(\dfrac{7}{144}\right)\ \mathrm{cm^{-1}}$

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