10?

Asked by smanishkumar2002 | 20th May, 2018, 10:46: PM

Expert Answer:


straight E subscript straight n equals space minus 13.6 space plus 12.1

space space space equals space 1.5 space eV

straight n squared space equals straight E subscript 1 over straight E subscript 2

space space space space equals space fraction numerator 13.6 over denominator 1.5 end fraction

straight n squared space equals space 3

therefore space Transition space occurs space from space 3 rd space orbit space to space 1 space st space orbit.

therefore space spectral space lines space emitted space equals space sum space increment straight n

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals sum open parentheses 3 minus 1 close parentheses

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space sum open parentheses 2 close parentheses

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 2 plus 1
space
space space space space therefore space spectral space lines space emitted space equals 3
 
Total spectral lines emitted is 3.

Answered by Varsha | 21st May, 2018, 10:17: AM