How do you solve this? what formulas do you need? how do you go from n=3 to n=5? Please help! what frequency of light is required to cause an electron in the helium ion (He+) to undergo a transition from level n=3 to level n=5? a) 2.34x10^14 Hz b)9.36x10^14Hz c)6.20x10^-19 Hz d)1.55x10^-19 Hz e)1.10x10^-6 Hz