Q. The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is :
A) 2
B) 1
C) 4
D) 0.5
Explanation
[Solution] Series limits: $1/\lambda_B = R/4$ and $1/\lambda_L = R$, so $\lambda_B/\lambda_L = 4$. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.