TS EAMCET · Physics · Atomic Physics
In a hydrogen sample, if the atoms are excited to states with principal quantum number 20 , then the number of different wavelengths which may be observed in the spectrum is
- A 100
- B 140
- C 190
- D 230
Answer & Solution
Correct Answer
(C) 190
Step-by-step Solution
Detailed explanation
When atom are excited from ground state to excited state with \(n=20\), then number of spectral line possible are \(=\frac{n(n-1)}{2}\) [where, \(n=\) principal quantum number] \(=\frac{20(20-1)}{2}=190\)
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