3it will form a series and u know the summation for the series.
i read the following from a book but i am not able to understand how the generalised formula is given.plz explain after reading these "the no. of spectral lines produced when electron returns from n2 to n1 energy level =( n2- n1) (n2- n1+1) /2 " general form: the no of spectral lines produced when the electron from nth shell to ground state = n(n-1) /2 how r they getting these formula any derivation there?? plz explain the concept...................
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6 Answers
1i am not able to get u ........
can u please explain in detail?
1for example take n=5
in the first case 5 spectral lines are observed
in the second case 2
in the third case only 1
like this taking all the possible spectral lines for transistion from 5 to 1, the number u get is 10.
u'll learn the summation techniques in the due course.
1gud work mrnobody..........evryone should be clearing others doubts as a tiitian.............
9for n to 1
case ending with 1
n→1
n-1→1
....
2→1 so n-1 cases
case ending with 2
n→2
....
3→2 so n-2 cases
similar cases
so its n-1 + n-2 + ......1 = n(n-1)/2
similar for n2,n1 derivation