question_answer

A certain transition in H spectrum from an excited state to the ground state in one or more steps gives rise to a total of 10 lines. How many of these belong to the UV spectrum?

A) \[3\]

B)   \[4\]

C) \[6\]

D)   \[5\]

Correct Answer: B

Solution :

[b] \[\frac{n(n-1)}{2}=10,\]    \[\therefore \,\,\,\,n=5\] \[{{n}_{1}}=1\] (ground state)     \[{{n}_{2}}=5\] (excited state)