WAEC - Physics (1993 - No. 53)
lf Einstein’s photoelectric equation is represented by hf - W = Φ where h is Planck’s constant, f the frequency of incident radiation and W the work function of the material, what does the symbol Φ up stand for?
Energy of the photons
Maximum Kinetic energy of the ejected electrons
Threshold frequency of the photons
Stopping potential of the electrons
Velocity of the electrons