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Grade: 12

                        

Electronic transistion in He + ion takes place from n 1 to n 2 shell such that: 2n 2 +3n 1 =18 2 n 2 -3n1=6 What will be the totalno. of photons emitted when electron transit to n1 shell?

4 years ago

Answers : (3)

Vikas TU
12158 Points
							
Solve both the eqns. and get the value of n1 and n2.
Then to know total number of photons to n1 state,
Apply the fomulae:
n1(n1-1)/2
4 years ago
Mudit
67 Points
							
By solving I got n1=2 and n2=6 By applying the formula I got the answer 1 while the answer given in book is 10. So help me out with this.
4 years ago
Vikas TU
12158 Points
							
Dear Mudit,
Remmeber these two formulaes:
1)
Maximum no. of photons they eemits if they return to ground state is:
n(n-1)/2
2)
And for n2 to n1 level,
formmulae is:
(n2-n1)(n2-n1+1)/2 gives 10 after putting the values of n1 and n2.
 
plz approve too.
4 years ago
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