Question

7.
An electron jumps from 4th excited state to ground state in hydrogen atom, then the number of lines obtained
in UV region will be​

Answer 1

Answer:

6

this how you do it

No of spectral lines is given by

(n2 - n1) (n2 -n1 + 1)

2

n2 = 4 (given)

n1 value depends upon which region of spectral lines you want to calculate

Eg if you wanna know the number of spectral lines in

Visible region, ie, Balmer series => n1 = 2

UV region, ie, Lyman series => n1 = 1

Here, we are asked about the number of spectral lines in UV section, so, n1 = 1

Therefore, No of spectral lines in UV region

= (4-1) (4-1+1) = 6

2