According to the bohr model of a hydrogen atom, the frequency of light radiated by an electron moving from an orbit n1 to an orbit n2 corresponds to the energy level difference between n1 and n2 of e=e0(1n21−1n22), where e0=−mez2e432π2ϵ20ℏ2, and where me is the electron mass, z is the atomic number, e is the magnitude of the electron charge, ϵ0 is the permittivity of free space, and ℏ is planck's constnt divided by 2π. in the case of hydrogen (z=1) e0=−13.6ev.

part a: find the frequency of light f radiated by an electron moving from orbit n1=2 to n2=1 inside of a he+ ion.
part b: in the bohr model of hydrogen, the radius of the nth orbit is defined as rn=a0n2z, where a0==5.29