Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Engineering
  • Hydrogen atom in ground state is excited by a monochromatic radiation of λ= 975 A°. Number of spectral lines in the resulting spectrum emit

Hydrogen atom in ground state is excited by a monochromatic radiation of λ= 975 A°. Number of spectral lines in the resulting spectrum emit

Answers (1)

Energy of the photon, E=\frac{h c}{\lambda} 

E=\frac{6.63 \times 10^{-34} \times 3 \times 10^{8}}{975 \times 10^{-10}} \mathrm{J}$ \\ $=\frac{6.63 \times 10^{-34} \times 3 \times 10^{8}}{975 \times 10^{-10} \times 1.6 \times 10^{-19}} \mathrm{eV}$\\ $=12.75 \mathrm{eV}$\\

After absorbing a photon of energy 12.75 eV the electron will reach to third excited state of energy -0.85 eV since energy difference corresponding to n = 1 and n = 4 is 12.75 eV.

Number of spectral lines emitted = \frac{n(n-1)}{2} = \frac{4(4-1)}{2}=6

Posted by

Satyajeet Kumar

View full answer

JEE Main high-scoring chapters and topics

Study 40% syllabus and score up to 100% marks in JEE

Similar Questions

Trending Articles/News

anam-khan

JEE Main Result 2024 Live: JEE Mains session 2 results at jeemain.nta.ac.in soon; rank predictor
anam-khan

JEE Main 2024 session 2 final answer key out at jeemain.nta.ac.in; steps to check probable scores
anam-khan

JEE Main Result 2024 Live: Download session 2 final answer key at jeemain.nta.ac.in; rank predictor, cutoff

Latest Question