Question

the most number of Balmer lines formed when electrons fall from 4th shell
a.2
b.3
c.4
d.1​

Answer 1

Answer:

When electron transition from n

th

 to ground state then Σ(n−1) spectral lines are produced

fourth energy level means n = 4

Thus if electrons transiton from fourth energy level then Σ(4−1)=3+2+1=6 spectral lines are produced

Explanation:

Balmer series n

1

​

=2 and n

2

​

=7

Hence, Number of spectral lines =n

2

​

−n

1

​

=7−2=5