MHT CET · Physics · Atomic Physics
The wave number of first line in Lyman series of hydrogen atom is ( \(R\) is Rydberg's constant)
- A \(\frac{3 R}{2}\)
- B \(\frac{3 R}{4}\)
- C \(2 R\)
- D \(\frac{R}{2}\)
Answer & Solution
Correct Answer
(B) \(\frac{3 R}{4}\)
Step-by-step Solution
Detailed explanation
According to Rydberg equation:
\(\frac{1}{\lambda}=R\left(1-\frac{1}{n^2}\right)\)
For first line, electron moves from \(n=2\) to the lowest energy level of the electron.
Therefore, corresponding wave no. is given by: \(\frac{3 R}{4}\)
\(\frac{1}{\lambda}=R\left(1-\frac{1}{n^2}\right)\)
For first line, electron moves from \(n=2\) to the lowest energy level of the electron.
Therefore, corresponding wave no. is given by: \(\frac{3 R}{4}\)
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