1 \times 10^7 \, m^{-1} \), \( n_1 = 1 \), and \( n_2 = 5 \).
Plugging in the values, we get:
\[ \frac{1}{\lambda} = 1.1 \times 10^7 \left( \frac{1}{1^2} - \frac{1}{5^2} \right) \]
\[ \frac{1}{\lambda} = 1.1 \times 10^7 \left( 1 - \frac{1}{25} \right) \]
\[
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