1. The problem statement, all variables and given/known data Prove that a free, stationary, electron can't fully absorb a photon 2. Relevant equations 3. The attempt at a solution I have no idea where to start.I must mention that i m on the 12 grade and not using calculus-based physics.And i've only studied and learned equations in quantum mechanics that involve planck's constant(h) and not the reduced planck constant (h bar). Thank you!