CUET · PHYSICS · PYQ PAPER 2025
The hydrogen atom is excited from ground state to a state with the principal quantum number (n) = 4. The number of spectral lines in the emission spectra will be
- A 6
- B 5
- C 4
- D 3
Answer & Solution
Correct Answer
(A) 6
Step-by-step Solution
Detailed explanation
\(N = \frac{n(n-1)}{2}\) \(N = \frac{4(4-1)}{2}\) \(N = \frac{4 \times 3}{2}\) \(N = 6\)
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