What is the wave number of the lowest energy transition in the Balmer series?
- A$R_H \left( \frac{36}{5} \right)$
- B$R_H \left( \frac{5}{36} \right)$
- C$R_H \left( \frac{21}{100} \right)$
- D$R_H \left( \frac{100}{21} \right)$
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