An Energy of 13

Multiple Choice

An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. Selecting the longest wavelength that will work from the those given below, what wavelength is needed if a photon accomplishes this task?

A) 60 nm
B) 80 nm
C) 70 nm
D) 90 nm
E) 40 nm