Q 12-12-069JEE MainJEE Main 2023 (10 Apr, Shift 2)Easy
If $917\ \text{Å}$ be the lowest wavelength of Lyman series then the lowest wavelength of Balmer series will be ______ Å.
Numerical value type. Enter your answer.
Answer: 3668
Series limits: Lyman $\dfrac1\lambda=R$, Balmer $\dfrac1\lambda=\dfrac R4$. So the Balmer limit is $4\times917=3668\ \text{Å}$.
Solution by Sreeraj P, M.Sc Physics