[URGENT! Stopping Potential~~~~~~~#######~~~~~~~~~~~~~~~~ 1. The problem statement, all variables and given/known data max Kinetic_energy= e*Vs=hf-work_function Vs is the stopping potential The attempt at a solution I am wondering, does this stopping potential refers the voltage difference of V_Emitter (where the line shines on) - V_collector(where the electron travels to), and thus, the stopping potential is usually positive? Also, for that equation max kinetic_energy= e*Vs, 'e' is just the charge= +ve 1.602*10^-19? so that the max kinetic energy in this case, (+5 V)*(+ 1.602*10^-19)= +ve number?