Q. In Bohr’s series of lines of hydrogen spectrum, the third line from the red end corresponds to which one of the following inner-orbit jumps of the electron for Bohr orbit in an atom of hydrogen?
A) 3$\rightarrow$2
B) 5$\rightarrow$2
C) 4$\rightarrow$1
D) 2$\rightarrow$5
Explanation
(b)
Hydrogen spectrum coloured radiation means visible radiation corresponds to Balmer series $\left( n_{1} = 2,\ n_{2} = 3,4\ \ldots \right)$
[image:2_image28.emf]
3rd line from the red end it means 5$\rightarrow 2$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.