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Chemistry · Structure of atom
हिन्दीIf the wavenumber of a spectral line in the Paschen series of hydrogen spectrum is \( 9.139 \times 10^3 \text{ cm}^{-1} \), calculate the higher principal quantum number \( n_2 \) from which the electron transition takes place (\( R_H = 109677 \text{ cm}^{-1} \)).
Correct answer · Option 2
\( n_2 = 4 \)
Explanation
Using Rydberg formula for Paschen series, \( \bar{\nu} = R_H (\frac{1}{3^2} - \frac{1}{n_2^2}) \). Substituting values gives \( n_2 = 4 \).
