Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • School
  • A hydrogen atom in its excited state emits radiations of wavelengths and when it f

A hydrogen atom in its excited state emits radiations of wavelengths 1218\AA and 974.3\AA when it finally comes to the ground state. Identify the energy levels from where transitions occur. Given Rydberg constant R=1.1\times 10^{7}\; m^{-1}. Also specify the spectral series to which these lines belong.

 

 
 
 
 
 

Answers (1)

\lambda _{1}=1218\; \AA

\lambda _{2}=974.3\; \AA

Rydberg const, R=1.1\times 10^{7}\; m^{-1}

\frac{1}{1218\times 10^{-10}}=1.1\times 10^{7}\left ( \frac{1}{1^2}-\frac{1}{n^{2}} \right )

n^{2}=\frac{1}{0.2536}

n^{2}=3.9429               \therefore n=1.98\cong 2

 given \lambda _{2}=974.3\; \AA 

\frac{1}{974.3\times 10^{-10}}=1.1\times 10^{^{-1}}\left ( \frac{1}{1^{2}}-\frac{1}{n^{2}} \right )

n^{2}=\frac{1}{0.0669}

n^{2}=14.9411

\therefore n=3.86\cong 4

These lines belong to layman series

Posted by

Safeer PP

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

Board Exam Result 2025 Live: UK Board 10th, 12th results tomorrow; AP SSC, TS Inter, UP, CBSE updates
anam-khan

When will CBSE Class 12 results 2025 be declared? Last two years' trends
anam-khan

CBSE Class 10, 12 board exams 2025 from April 7 to 11 for sports students

Latest Question