This is not a specific question; I'm just unclear about a concept. 1. The problem statement, all variables and given/known data Given the kinetic energy of an electron emitted, how would you find the wavelength? 2. Relevant equations E=h*frequency or E=0.5mv2 3. The attempt at a solution I'm thinking I would use the secon equation, find v, then use de Broglie's relationship to find wavelength. Am I on the right track?