H,He^(+), Li^(2+) are examples of atoms or ionswith one electron each . The energy of such atoms when in the n-th energy state (according to Bohr,s theory , n=1,2,3…. =principal quantum number ) is E_n =(13.6 Z^2)/(n^2) eV (1 eV =1.6xx10^(-19)J). For the ground state ,n=1 . in order to raise theatom from the ground state to n=f , the suitable incidentlight should have a wavelength given by lambda=(hc)/(E_f-E_1). But the atom cannotstay permanently in thef-energy state, ultimately , it comes to the ground state by radiating the extra energy ,E_f-E_1 as electromagnetic radiation .The electron of the atom comes from n=f to n=1 in one or more steps using the permitted energy levels . As a resultthere is a possibilityof emission of radiation with more than one wavelength from the atom. Planck's constant=6.63 xx10^(-34)J*s and velocity of light c=3xx10^(8)m*s^(-1). (iv) What is the value of the minimum wavelength in example (ii)?