Question

Solve this:
Q. Hydrogen atom is ground state is excited by a monochromatic radiation of $\lambda$ = 975 Å. Number of spectral lines in the resulting spectrum emitted will be :-
(1) 3
(2) 2
(3) 6
(4) 10

Answer 1

$$\begin{gathered} DearStudent, \\ \lambda =975A° \\ lettheexcitedstateben \\ \frac{3*{10}^8}{975*{10}^{-10}}=3.29*{10}^{15}\left(1-\frac{1}{n^2}\right) \\ n=4 \\ nospectrallines=3+2+1=6 \\ option3 \\ Regards \end{gathered}$$