Ankit Khandelwal
Last Activity: 4 Years ago
Since electron travel from ground state to infinity so the energy liberated is 13.6 ev + kinetic energy
13.6 + 1.8 =15.4ev
13.6 + 4 = 17.6 ev
Now we know E=hc/lamda(in angstrom)
we want lambda1/lambda2= 17.6/15.4 = 8/7